File talk:Duisburg-Ruhrschleusen.jpg

This file has been used in: umgebung (in de). Hotel Friederichs Duisburg. Retrieved on 2011-09-15. Name on the imprint page, no license 2011-09-15: E-mail sent

This file has been used in:   Hydraulic Steel Industry (in en). KettenWulf Betriebs GmbH. Retrieved on 2011-09-16. No name, no license 2011-09-16: E-mail sent 2011-10-12: 2nd E-mail sent 2011-10-13: Image removed from page

This file has been used in: Область применения / Производство металлоконструкций для гидротехнических сооружений (in ru). компания Мегасервис г. Вологда. Retrieved on 2011-10-18. No name, no license