File talk:System of gdr border fortification.jpg

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Whats the original source? a print? --Itu (留言) 16:15, 21 December 2014 (UTC)[回复]

Description: 20 is missing. --95.239.2.134 23:36, 4 November 2019 (UTC)[回复]

取自“https://commons.wikimedia.org/w/index.php?title=File_talk:System_of_gdr_border_fortification.jpg&oldid=373551901”