Copyright protection shall not be afforded to: a) expressions of traditional folklore and art; b) daily news or information on current facts and events; c) official documents: legal acts, treaties and the official translations thereof; d) official symbols and signs (flags, coats of arms, medals, coins);; e) political speeches, speeches delivered in the court; f) results obtained by technical means without the intervention of human creative activity.
Copyright shall not cover scientific discoveries, ideas, principles, methods, procedures, viewpoints, systems, ceremonies, scientific theories, mathematical formulas, statistical diagrams, rules of games, even if they are expressed, described, disclosed, commented in works.
저작자가 1967년에 사망한 이 작품은 미국, 그리고 저작권 보호 기간이 저작자 사후 50년, 또는 그 이하인 모든 국가에서 퍼블릭 도메인입니다.
You must also include a United States public domain tag to indicate why this work is in the public domain in the United States. Note that this work might not be in the public domain in countries that do not apply the rule of the shorter term and have copyright terms longer than life of the author plus 50 years. In particular, Mexico is 100 years, Jamaica is 95 years, Colombia is 80 years, Guatemala and Samoa are 75 years, Switzerland and the United States are 70 years, and Venezuela is 60 years.