DescriptionWilliam G. Stratton (Illinois Blue Book Portrait 1959-1960).jpg
English: Portrait of Illinois Governor William G. Stratton from the 1959-1960 Illinois Blue Book. In public domain because IL Blue Book did not have a copyright notice (and was also not registered).
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.