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.
Copyright would have to have been renewed between 1958 and 1960. No relevant renewals were found for artworks, books, or periodicals for Edward Weston, School Arts Magazine, or Cabbage Leaf.
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