First published in Cuba without compliance with US copyright formalities and used in Cuba before February 20, 1972
Anonymous works (not photographs)
Used more than 50 years ago
First published in Cuba without compliance with US copyright formalities and used in Cuba before February 20, 1947
Corporate and government works
Never (perpetual copyright)
Published before 1929 (95 years ago)
All other works
More than 50 years has passed since the 1st of January following the death of the author
a) Published in Cuba without compliance with US copyright formalities, author died before 1947 or b) Published before 1929 (95 years ago)
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Uploaded a work by Artist is Unknown, book by Reverter Delmás, Emilio from https://archive.org/details/cubaespaolares01reve/page/720/mode/2up?q=vega+alta+camajuani with UploadWizard