File:Nikolay Yakovlevich Demyanov.png

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Українська: Світлина Миколи Дем'янова з журналу Успіхи хімії. Автора фото у журналі не зазначено, і пройшло 70 років з дати публікації, тобто це фото вільне.
Date
Source Russian Chemical Reviews journal — 1948. — Vol. 17, № 5. — P. 609
Author AnonymousUnknown author

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Public domain

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

  1. it was first published outside the United States (and not published in the U.S. within 30 days),
  2. 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,
  3. it was in the public domain in its home country (Russia) on the URAA date (1 January 1996).

It is also in the public domain in other countries and areas where the copyright terms of anonymous or pseudonymous works are 70 years or less since publication.

For background information, see the explanations on Non-U.S. copyrights.
Russian anon works was protected for 70 years from creation, meaning it was PD from 2018.

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