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 San Diego State University from [https://library.sdsu.edu/pdf/scua/yearbooks/1969-70.pdf The Year 1969–1970 San Diego State], p. 260 with UploadWizard