This work is in the public domain in Russia according to article 1281 of the Civil Code of the Russian Federation (details).
This work was originally published before January 1, 1928 and the known author of this work:[1]
died before January 1, 1949 or
died between January 1, 1949 and January 1, 1953, did not work during the Great Patriotic War and did not participate in it.
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1928. [1] If the author of this work was subjected to repression and rehabilitated posthumously, replace the death date by the later rehabilitation date.