English: This photograph of Armstrong Sperry, taken in 1941 when he won the Newbery Medal, was widely distributed by the author and his publisher for reproduction and publicity as the author's official headshot. It did not include a copyright notice at the time, and no application for extension of a copyright is on record, and so it is considered to be in the public domain.
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.
This photograph of Armstrong Sperry, taken in 1941 when he won the Newbery Medal, was widely distributed by the author and his publisher for reproduction and publicity as the author's official headshot. It did not include a copyright notice at the time, a