English: No permission is required for the following reasons:
St. Petersburg Times did not typically carry a copyright notice in the header or elsewhere covering the newspaper as a collective work. Syndicated content or advertisements may carry their own notices separately. Issues upwards to February 1989 do not visibly carry collective copyright notices [1].
The source images linked above are mechanical scans of the underlying public domain work. These scans are faithful reproductions of the photograph that do not meet the threshold of originality necessary to assert a copyright interest.
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.