No copyright notice appears in the newspaper edition. Verified also in the Catalogue of Copyright Entries that one was never registered for 1947 works.
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 (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
Uploaded a work by unnamed from [https://www.newspapers.com/clip/94261329/the-miami-news/ "Woman Sports Photographer, Visiting Here, Likes to Take Boxing Pictures"]. ''The Miami Daily News''. Miami, Florida. February 12, 1947. p. 12 with UploadWizard