File:Henryk Zygalski2.jpg

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Summary

DescriptionHenryk Zygalski2.jpg	English: Henryk Zygalski - Polish mathematician and cryptologist, helped decipher Enigma. Polski: Henryk Zygalski - polski matematyk i kryptolog, pomógł odszyfrować Enigmę.
Date	1940s date QS:P,+1940-00-00T00:00:00Z/8
Source	Tevatron
Author	Unknown authorUnknown author

This photograph is in the public domain because according to the Art. 3 of copyright law of March 29, 1926 of the Republic of Poland and Art. 2 of copyright law of July 10, 1952 of the People's Republic of Poland, all photographs by Polish photographers (or published for the first time in Poland or simultaneously in Poland and abroad) published without a clear copyright notice before the law was changed on May 23, 1994 are assumed to be in the public domain in Poland.

This work is in the public domain in the United States because it meets three requirements:

it was first published outside the United States (and not published in the U.S. within 30 days),
it was first published before 1 March 1989 without copyright notice or before 1964 without copyright renewal or before the source country established copyright relations with the United States,
it was in the public domain in its home country (Poland) on the URAA date (1 January 1996).

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	08:18, 28 May 2008		369 × 599 (49 KB)	wikimediacommons>Noahv	{{Information \|Description=Jerzy Witold Różycki, 1906—1978 \|Source=Tevatron \|Date=2005-11-13 \|Author=Unknown }} 晚年的波兰密码学家亨里克·佐加尔斯基 {{Polishpd}}

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