WWI reconnaisance aircraft Lloyd C.II
Unknown author<span style="display: none;">Unknown author</span>
<p>From the book Repülőászok 1914-1918, Zrínyi Kiadó, Budapest 2015, <a href="//commons.wikimedia.org/wiki/Special:BookSources/978_963_327_634_1" title="Special:BookSources/978 963 327 634 1">ISBN 978 963 327 634 1</a>
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First published during the World War I