English: Cover of the Fall 1929 issue of Science Wonder Quarterly. Original copyright holder would have been either the artist, Frank R. Paul, or the publisher, Continental Publications.
Copyright not renewed per a search of "U.S. Copyright Renewals 1950 - 1977". Project Gutenberg, a free digital library holding public domain texts, holds a searchable copy of this at http://www.gutenberg.org/etext/11800. Search terms were "Science Wonder", "Air Wonder", "Wonder Stories", "Continental Publications", "Frank Paul" and "Frank R. Paul". See User:Quadell/copyright.
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.
{{Information |Description={{en|Cover of the Fall 1929 issue of ''en:Science Wonder Quarterly''. Original copyright holder would have been either the artist, Frank R. Paul, or the publisher, Continental Publications.}} |Source=Transferred from [htt