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 Unknown from Hugh Nibley photographs of himself, MSS 2721 Series 5 Sub-Series 1, L. Tom Perry Special Collections, Harold B. Lee Library, Brigham Young University with UploadWizard