ファイル:Heinkel He 70.jpgDescriptionHeinkel He 70.jpg English: Heinkel He 70 Blitz Date 22 August 2012 Source https://www.flickr.com/photos/sdasmarchives/7585398154/ Author SDASM
ファイル:He 51W.jpgHeinkel He 51W, german seaplane 1936 from polish wikipedia article Heinkel He 51 https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons