이 저작물은 1929년~1963년에 미국에서 발표되었으며, 저작권 갱신(renewal)이 이루어지지 않은 퍼블릭 도메인입니다.
미국 저작물에 대한 저작권 상호주의가 적용되지 않는 국가의 경우, 무조건적인 퍼블릭 도메인이 적용되지 않으며, 해당 국가 내에서는 여전히 저작권이 존재할 수 있습니다. 예를 들어, 캐나다(사후 70년), 중국 대륙(사후 50년, 홍콩/마카오 제외), 독일(사후 70년), 멕시코(사후 100년), 스위스(사후 70년) 등은 저작권 상호주의를 적용하지 않습니다.
This work was first published in Uganda and is now in the public domain because its copyright protection has expired in Uganda by virtue of the non-retrospective Copyright and Neighbouring Rights Bill 2004, III, § 13 or it entered the public domain prior to the commencement of that law on July 24th, 2004 by virtue of the previous Copyright Act 1964 (details). The work meets one of the following criteria:
a) it is a photographic work and 50 years have passed since its creation;
b) it is a computer program, audio-visual work or sound recording and 50 years have passed since the date of its first publication;
c) it is a literary, musical or artistic work that was published before January 1st, 1954 and its author died before Jan 1st, 2004;
d) it is a Government work and 50 years have passed since its first publication;
e) it is another type of work and 50 years have passed since the author's death.
To the uploader: Please provide authorship and publication details.