Note: Williamson was the head of the US Weather Bureau Nashville office at this time. It is unclear whether he took these photos in the line of his official duties, or even if he took them at all. However, no other photographer is credited in the article. The Journal did not carry a copyright notice and was not registered for copyright in 1933.
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.
{{Information |Description={{en|1=Photos taken after tornado in 1933}} |Source=http://www.srh.noaa.gov/ohx/?n=nashvilletornado |Author=Mark A. Rose |Date=1933-03-14 |Permission= |other_versions= }}