DescriptionExcavation map of Chetro Ketl by Florence M. Hawley (1934).png
English: Excavation map of Chetro Ketl by Florence M. Hawley (1934)
Date
Source
Plate X from The significance of the dated prehistory of Chetro Ketl, Chaco Caänon, New Mexico. University of New Mexico Press. OCLC 328211. Located at: New York State Library
A renewal search was done in books for the years 1961 and 1952. There were renewals for others with the surname of Hawley but none for Florence M. Hawley. There were also no renewals during this time frame for Florence Ellis (Hawley's married name). There's no evidence of the copyright being renewed for this book.
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.