English: Aerial image of Ankeny, Iowa circa 1958. Taken from 1959 Ankeny High School yearbook two-page spread and composited together from scans of those pages.
Date
Source
Iowa Heritage Digital Collections - 1959 Ankeny High School Yearbook
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.
Note: While public source attempts to relabel the work as non-commercial only, the original work has no copyright listed and published in 1959, so attempting to add copyright without any changes, modifications, or other derivative value to the work fails to reclassify original copyright.