I don't want to fail to indicate the sources, and they would be:
The trolleybus network in Eberswalde, by Dr.-Ing. Klemens Windorfer, director of the public utility Eberswalde, from the professional journal Verkehrstechnik (traffic engineering) booklet no. 14 from 20 July 1940,
Anniversary publication 50 years trolleybus traffic - 80 year elektric city traffic - Eberswalde-Finow by Ing. Klaus Reichenbach, Plauen/FRG
Article "Obus als Alternative" by Wolf-Dieter Machel from the magazine "Straßenbahn-Magazin" 5/96
Passenger information of the Barnimer Bus Company Ltd. and Verkehrsverbund Berlin- Brandenburg Ltd.
Stadtverkehr Eberswalde "Gleislose Bahn"-Straßenbahn-Obus, published by the Arbeitsgruppe Obus des Denkmalpflege-Vereins Nahverkehr Berlin e.V., Verlag: Gesellschaft für Verkehrspolitik und Eisenbahnwesen e. V. (GVE), Berlin/FRG
Point 2.1. Photo (pew_netz2017_01_bbg170319.jpg) by Barnimer Busgesellschaft mbH, Eberswalde/FRG, 19 March 2017
Point 188.8.131.52.01 Photo (pew_sk8tr10w01_01.jpg) by K. Reichenbach, Plauen/GDR, June 1968 The photo (pew_sk14tr03w01inpdm983_01_ma920609.jpg) was kindly sent by M. Althans, Eberswalde, 09 June 1992. The photo (pew_sk14tr03w01_04_in_almaty3048_mg041215.jpg) was kindly sent by M. Golbreicht, Almaty/KZ, 15 December 2004. The photo (pew_ik280.93w01_07_in_timisoaraw8_ms.jpg) was kindly sent by M. Schindler, Berlin/FRG, 28 June 1996.
Point 184.108.40.206.02 Photo (pew_keo1w02+hgwxylin_01.jpg) by W. Schreiner, Leipzig/GDR, Oktober 1958 Photo (pew_sk9tr0w02_01_ga720716.jpg) by G. Aberson, 16 July 1972 The photo (pew_ik280.93w02_04_ul_dbverl.jpg) was kindly sent by U. Lange, Eberswalde/FRG, 09 November 1999.
Point 220.127.116.11.03 Photo (pew_mpe1w03_01_in_werdau_wsw.jpg) was made from the factory Schumann GmbH Werdau/Germany Photo (pew_keo1w03_01_sms.jpg) from the collection by M. Schatz Photo (pew_sk14tr03w03+ik280.93wxy_01_kr8906.jpg) by K. Reichenbach, Plauen/GDR, June 1989 The photo (pew_sk14trw03_04_in_ostrava3222_pm.jpg) was kindly sent by P. Mitcaek/CZ, 27 February 1996. The photo (pew_sk14tr03w03_07_in_almaty3053_mg050130.jpg) was kindly sent by M. Golbreicht, Almaty/KZ, 30 January 2005. The photo (pew_ik280.93w03_10_intimiw18_kt030801.jpg - origin name: TM-18-1.jpg) was kindly sent by K. Tyszka, 01 August 2003.
Point 18.104.22.168.04 Photo (pew_mpe1w05+04+03_01.jpg) from the collection by K. Reichenbach, Plauen/FRG Photo (pew_lowa_w602aw04_01.jpg) by W. Schreiner, Leipzig/GDR, September 1957 Photo (pew_sk8tr6w04_01_ue.jpg) by U. Engel Photo (pha_budapest_nge152m17w359_240_exew004_at130126.jpg) by Ádám Tóth Budapest/H
Point 22.214.171.124.05 Photo (pew_mpe1w05+07_01_man41.jpg) from a leaflet by the company MAN The photo ((pew_ik280.93w05_11_in timi15_sd060302.jpg)) was kindly sent by S. Danescu, Timisoara/RO, 02 March 2006.
Point 126.96.36.199.06 The photo (pew_ik280.93w06_04_in timi17_jf010531.jpg) was kindly sent by J. Fuchs, Dresden/FRG, 20 June 2002.
Point 188.8.131.52.07 The photo (pew_mpe1w07_01_wbr440816.jpg) was kindly sent by Mr. Werner Bruyninckx Schoten/Belgium, February 2009. The photo (pew_ik280.93w07_06_in timi09_jf010531.jpg) was kindly sent by J. Fuchs, Dresden/FRG, 31 May 2001.
Point 184.108.40.206.09 Photo (pew_sk8trw09_01_mit_hg.jpg) from the collection by K. Reichenbach, Plauen/FRG Photo (pew_ik280.93w09_16_intimiw27_zn030816.jpg) by Zoltán Ádám Németh, Hungary, 16 August 2003
Point 220.127.116.11.11 Photo (pew_sk8tr6w11(II)+hgwxy701_03_ue801006.jpg) by U. Engel, 06 October 1980 Photo (pha_budapest_nge152m17w360_311_exew011_arany janos utca_kc130902) by I9-62 KäpCity, Budapest/H, 02 September 2013
Point 18.104.22.168.12 Photo (pew_sk8tr6w12+hgliwxy_01_ue.jpg) by U. Engel
Point 22.214.171.124.13 Photo (pew_sk9tr0w13+hgwxy_01.jpg) by K. Reichenbach, Plauen/FRG, July 1970 The photo (pew_ik280.93w13_02_tw910416.jpg - origin name: 022169.jpg) was kindly sent by www.tramway.com
Point 126.96.36.199.14 Photo (pew_sk9tr0w14+hgwxy700_01_jw7207.jpg) by J. Ward, July 1972.jpg Photo (pew_ik280.93w14_01_kr.jpg) by K. Reichenbach, Plauen/FRG, June 1989
Point 188.8.131.52.15 The photo (pew_ik280.93w15_04_intimiw33_sd020331.jpg - origin name: TRO_Ikarus_Ganz_33_front.jpg) was kindly sent by S. Danescu/Romania.
Point 184.108.40.206.16 Photo (pew_sk9tr13w16+sk9trwxy_01_sms.jpg) from the collection by Mario Schatz The photo (pew_ik280.93w16_03_rk92.jpg) was kindly sent by R. Küger, 1992. The photo (pew_ge110m16w16_03_in_timisoaraw34_ms.jpg) was kindly sent by M. Schindler, Berlin/FRG. Photo (pew_ge110m16w16_06_intimiw34_zn030816.jpg) by Zoltán Ádám Németh, Hungary, 16 August 2003 Photo (pew_ge110m16w16_05_intimiw34_cg.jpg) by Catalin Ghita/Romania
Point 220.127.116.11.17 Photo (pha_budapest_nge152m18w361_195_exew017_garay utca_at130215.jpg) by Ádám Tóth Budapest/H, 15 February 2013
Point 18.104.22.168.18 Photo (pew_sk9tr14w18_02.jpg) by K. Reichenbach, Plauen/FRG, May 1978 Photo (pew_ik280.93w18_06_uh.jpg) was kindly sent by Uwe Henkel, Eberswalde/FRG
Point 22.214.171.124.19 Photo (pew_ge110m16w19_01_uh.jpg) was kindly sent by Uwe Henkel, Eberswalde/FRG
Point 126.96.36.199.20 The photo (pew_ik280.93w20_05_in timi12_jf010531.jpg) was kindly sent by J. Fuchs, Dresden/FRG, 31 May 2001
Point 188.8.131.52.21 The photo (pew_ik280.93w21_01_in_chelyabinskw3863.jpg) was kindly sent by S. Sprengler, 30 May 2001 Photo (pew_ik280.93w21_041_in_chelyw3863_sil080306.jpg) by Silvish, Chelyabinsk/RU, 06 March 2008
Point 184.108.40.206.22 The photo (pew_ik280.93w22_002_ng9404.jpg) was kindly sent by Norman Griffith, Neu-Isenburg/FRG, April 1994. The photo (pew_ik280.93w22_10_in_szegedw507.jpg) was kindly sent by T. Nagy/Hungary. Photo (phu_szeged_ik280.93w507_035_exew022_gba070520.jpg) by gbalage, Hungary, 20 May 2007
Point 220.127.116.11.23 The photo (pew_ik280.93w23_01_norgri.jpg) was kindly sent by Norman Griffith, Neu-Isenburg/FRG, 22 March 1991. The photo (pew_ik280.93w23_02_in_chelyabinskw3862.jpg) was kindly sent by S. Sprengler, 30 May 2001. Photo (poru_chelyabinsk_ik280.93w3862_025_exew023_sil090320.jpg) by Silvish, Chelyabinsk/RU, 20 March 2009
Point 18.104.22.168.24 Photo (pew_sk9tr15w24_02_fs.jpg) by F. Steinbach Photo (pew_ik280.93w24_08.jpg), photographer unknown The Photo (pew_ik280.93w24_09_in_chelyabinskw3864.jpg) was kindly sent by S. Sprengler, 30 May 2001. Photo (prua_chelyabinsk_ik280.93w3864_055_exew024_ant090917.jpg) by Antifaktor, Chelyabinsk/RU, 17 March 2009
Point 22.214.171.124.25 The photo (pew_ik280.93w25_17_in_szegedw506.jpg) was kindly sent by T. Nagy/Hungary. Photo (phu_szeged_ik280.93w506_039_exew025_gba070520.jpg) by gbalage, Hungary, 20 May 2007
Point 126.96.36.199.26 The photo (pew_ge110m16w26_06_in_timisoaraw36_pm.jpg) was kindly sent by P. Mitcaek, 25 August 1998.
Point 188.8.131.52.30 Photo (pha_budapest_nge152m17w355_243_exew030_cserto utca_kc130404.jpg) by I9-62 KäpCity, Budapest/H, 04 April 2013
Point 184.108.40.206.31 Photo (pha_budapest_nge152m17w356_227_exew031_oers vezer tere_kc121213.jpg) by I9-62 KäpCity, Budapest/H, 13 December 2012
Point 220.127.116.11.32 Photo (pha_budapest_nge152m17w354_172_exew032_salgotarjani utca_kc130215.jpg) by I9-62 KäpCity, Budapest/H, 15 February 2013
Point 18.104.22.168.33 Photo (pha_budapest_nge152m17w362_296_exew033_cserto utca_kc140301.jpg) by I9-62 KäpCity, Budapest/H, 01 March 2014
Point 22.214.171.124.34 Photo (pha_budapest_nge152m17w357_182_exew034_egressy_ut_aba1210.jpg) by A. Báti, Budapest/H, October 2012
Point 126.96.36.199.35 Photo (pha_budapest_nge152m17w353_234_exew035_kobanyai garazs_kc121006.jpg) by I9-62 KäpCity, Budapest/H, 06 October 2012
Point 188.8.131.52.36 Photo (pha_budapest_nge152m17w351_258_exew036_keleti palyaudvar_kc120712.jpg) by I9-62 KäpCity, Budapest/H, 12 July 2012
Point 184.108.40.206.37 Photo (pha_budapest_nge152m17w358_162_exew037_bajza utca_kc130630.jpg) by I9-62 KäpCity, Budapest/H, 30 June 2013
Point 220.127.116.11.38 Photo (pha_budapest_nge152m18w352_167_exew038_nagymezo utca_kc130902.jpg) by I9-62 KäpCity, Budapest/H, 02 September 2013
Point 18.104.22.168.39 Photo (pha_budapest_nge152m17w364_180_exew039_podmaniczky frigyes ter_kc13.jpg) by I9-62 KäpCity, Budapest/H, 2013
Punkt 22.214.171.124.40 Photo (pha_budapest_nge152m18w350_355_exew040_keleti palyaudvar_kc120712.jpg) by I9-62 KäpCity, Budapest/H, 12.07.2013
Point 126.96.36.199. The photos (pew_nge152m17_e-anl_07_famoumri.jpg) and (pew_nge152m17_e-anl_06_stroabun.jpg) were kindly sent by the company KIEPE ELEKTRIK GmbH & Co. KG Düsseldorf/FRG.
Point 188.8.131.52.07 The photo (pew_masssk9tr.gif) was kindly sent by V. Falkovs, Riga/LV.
Point 184.108.40.206.08 The photo (pew_masssk14tr.gif) was kindly sent by V. Falkovs, Riga/LV.
Point 2.3. Technical description and documentation of the switches U88 kindly sent by Kummler+Matter company Zürich/CH
Point 3. Research report of the Fachhochschule Köln - Comparative investigation of the balance from energy, costing and emission in the local public transport by the employment of trolleybuses and buses with Diesel engine by the public utility Solingen/FRG - by Mr. Prof. Dr.-Ing. U. Langer
Point 4.1. Photo (pew_elektromote_02_si82.jpg) from Siemens archive Photo (pew_strabaw02_01k_lsb.jpg) by Leon Saunier’s Buchhandlung, Stettin, published by Kunstverlag J. Goldiner Berlin C.25
Point 4.1.02 Photo (pew_elektromote_01_si82.jpg) from Siemens archive
Point 4.1.04 Photo (pew_strabaw02_01_lsb.jpg) by Leon Saunier’s Buchhandlung, Stettin, published by Kunstverlag J. Goldiner Berlin C.25 The photos (pew_strabasn4w01_02_krakow-w150_sjk41.jpg) and (pew_strabasn4wxy_20_sjk08.jpg) were kindly sent by J. Kolodziej, MPK Kraków/Pl. The photo (pew_strabasn4w02_04_krakow-w151-reko 2015_dps16.jpg) was kindly sent by Dr. Péter Sinka, Budapest/H, February 2016.
Point 4.2. The photo (pew_keo1w04_02k_55unfall.jpg) was kindly sent by G. Wiesner, Eberswalde/FRG.
Point 4.2.04 The photos (pew_keo1w04_unfall_03.jpg), (pew_keo1w04_unfall_01.jpg) and (pew_keo1w04_unfall_05.jpg) were kindly sent by G. Wiesner, Eberswalde/FRG.
Point 4.2.05 Photo (pew_lowa_w602aw04_01_ws5709.jpg) by W. Schreiner, Leipzig, September 1957
Point 4.3. The photo (pew_einwurf-zahlbox_02k_rk040222.jpg) was kindly sent by R. Küger.
Point 4.4.03 The photo (pbahnverladung_ge110.jpg) from "Salzburger Nachrichten " of 15 April 1992 and was kindly sent by G. Kempel, Wien/A.
Point 4.4.09 The photo (pew_nge152m17w30_02_in_soling.jpg) was kindly sent by J.P. Wenzel, Solingen/FRG. The photo (pew_nge152m17w30_03_in_soling.jpg) was kindly sent by C. Walter, Solingen/FRG.