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May 2015 book version of techniktagebuch.tumblr.com blog. (Usually published annually, but there were two editions in 2015, one in February and one in May.)
Okumak, EPUB indirmek veya dinlemek için ücretsiz hesabınla giriş yap.
Techniktagebuch Redaktionskollektiv · CC BY-NC-SA 4.0