Note that the uploaded photo is larger and of better quality than the one in the book.
A search for renewals was done in books for the years 1970 and 1971. Neither the title nor the author was listed; there's no evidence of copyright continuing on 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 (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.