Copyright law indicates between 1927 and 1977 published without a notice is in the public domain. Neither the masthead, nor publishing data contain a copyright indication. To be doubly safe, I checked the Catalog of Copyright Entries and nothing for Evansville. TJMSmith (talk) 15:39, 16 March 2022 (UTC)
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.