Файл:Zhizn zamechatelnykh lyudey Baron NA Korf yego zhizn i obshchestvennaya deyatelnost.pdf

Това произведение е обществено достояние в държавите, в които срокът на авторското право е 70 години или по-малко след смъртта на автора.

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It was published on territory of the Russian Empire (Russian Republic) except for territories of the Grand Duchy of Finland and Congress Poland before 7 November 1917 and wasn't re-published for 30 days following initial publications on the territory of Soviet Russia or any other states.

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Това произведение е обществено достояние в Съединените американски щати, защото е било публикувано преди 1 януари 1924 година.