Image:Zygalski sheet diagram.jpg
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Zygalski_sheet_diagram.jpg (44KB, MIME type: image/jpeg)
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According to the non-retroactive copyright law of July 10, 1952, of the People's Republic of Poland, all photographs by Polish photographers published before the law was changed on May 23, 1994 that are without a clear copyright notice are assumed to be in the public domain. |
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This image was uploaded under good faith using the above tag: however, it may be under United States copyright if it was first published on or after January 1, 1923.[1] | |
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- (del) (cur) 07:26, 5 October 2005 . . Listowy (Talk | contribs) . . 285×439 (44,978 bytes) ({{PD-Poland}})
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