This work is in the public domain because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed . For further explanation, see Commons:Hirtle chart and the copyright renewal logs . Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a. ), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.

This work is not an object of copyright according to the Law of Georgia No. 2388-Is of September 9, 1999 on Copyright and Neighbouring Rights

Article 5. Subject Matter Of Copyright

Copyright does not apply to ideas, methods, processes, systems, means, concepts, principles, discoveries and facts, even if they are expressed, described, explained, illustrated or embodied in a work

Article 8. Works To Which Copyright Does Not Apply

1. Copyright does not apply to the following works:

   a) official documents (laws, decisions of courts, other texts of administrative and normative character), as well as their official translations;

   b) official symbols of state (flag, emblem, anthem, award, monetary symbols, other official signs and symbols of state);

   c) information of events and facts.

2. When using the works mentioned in subparagraph "b" of this Article under the other persons name, it is possible to protect the right of author's name.

Full text of the Law: in English , in Georgian , in Russian .