A search for renewals was done in periodicals for the year 1977 and a renewal search was done at copyright.gov for the year 1978. There were no listings for the Miami Herald for either of these years. There's no evidence of continuing copyright for the photo.
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.
{{Information |Description=Photo of the Wometco-owned WTVJ-TV mobile truck in 1950. |Source=[http://www.ebay.com/itm/Vintage-1950-WTVJ-Channel-4-National-Television-Bus-Press-Photo-by-Marvin-Bloom-/371311577720?pt=LH_DefaultDomain_0&hash=item5673e50a78...
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