This work published in Serbia is in the public domain because its copyright expired pursuant to the Yugoslav Copyright Act of 1978 which provided for copyright term of the life of the author plus 50 years, respectively 25 years for photograph or a work of applied art. This applies to works already in the public domain on or before December 29, 2004 when a new copyright act became valid.
The work meets one of the following criteria:
a) a work of known authorship and the author died before January 1, 1954
b) an anonymous work and it was published before January 1, 1954
c) a photograph or a work of applied art published before January 1, 1973
A source should be included so that the status can be verified.
Note that other works enter the public domain 70 years after the author's death or 70 years after publication if the work was published anonymously. If this is the case please use {{PD-old-70}}.
This work is in the public domain in the United States because it meets three requirements:
it was first published outside the United States (and not published in the U.S. within 30 days),
it was first published before 1 March 1989 without copyright notice or before 1964 without copyright renewal or before the source country established copyright relations with the United States,
it was in the public domain in its home country on the URAA date (January 1, 1996 for most countries).
For background information, see the explanations on Non-U.S. copyrights. Note: This tag should not be used for sound recordings.
Captions
Students with wooden model airplanes in Sonta 1936