Please specify if terms of license are complied with! The Original Highrise - The Cathedral (2007-10-08). erbse(in en). skyscrapercity.com. Retrieved on 2014-03-24. No name, no license, image on imageshack.us
2014-03-24: DMCA take down notice sent to imageshack.us
Die Brücken von Köln(in de). manuelafischer-koeln.de. Retrieved on 2012-08-16. No name, no license, generic "Quelle: Wikipedia" (does this mean text and/or images?)
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Michel Bakker (Juni 2019). "EEN KEULSE BRUG MET SLOTEN TUSSEN KEIZERS". Bruggen27 (2): 27. Rijswijk: Nederlandse Bruggenstichting. ISSN1571-4586. Retrieved on 2019-07-14.
Roland Leucker. Mobilität - ein unkalkulierbares Risiko?(in de) (PDF) 18. deutschland.dasvonmorgen.de/STUVA e.V.. Retrieved on 2012-04-23. Name ok, no license, "Quelle: Wikipedia"
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Julius Rabenstein (2012-07-06). Die Hohenzollernbrücke in Köln(in de) 18. heerlagerderheiligen.wordpress.com/Das Heerlager der Heilige. Retrieved on 2012-07-07.
Michel Bakker (Juni 2019). "EEN KEULSE BRUG MET SLOTEN TUSSEN KEIZERS". Bruggen27 (2): 26. Rijswijk: Nederlandse Bruggenstichting. ISSN1571-4586. Retrieved on 2019-07-14.
Die Brücken von Köln(in de). manuelafischer-koeln.de. Retrieved on 2012-08-16. No name, no license, generic "Quelle: Wikipedia" (does this mean text and/or images?)
Die Brücken von Köln(in de). manuelafischer-koeln.de. Retrieved on 2012-08-16. No name, no license, generic "Quelle: Wikipedia" (does this mean text and/or images?)
2012-08-16: E-mail sent via contact form
This file has been used in:
Köln in Kürze(in de). koelnerleben-magazin.de / Känguru Colonia Verlag GmbH (2017-05-01). Retrieved on 2017-05-02. web.archive.org