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Even when you are translating from the German Wikipedia, you should give proper reference to that in accordance with the Wikipedia license!

And did you really used the books mentioned or did you just copy the mention? The Banner  talk 23:23, 2 January 2017 (UTC) reply

I also wrote the article on the German wikipedia. I really used the books when I wrote it. I own this books and ussed them also for the german wikipedia. FFA P-16 ( talk) 06:36, 3 January 2017 (UTC) reply