Salk_headlines.jpg
Description Salk headlines.jpg | Photo of newspaper headlines about polio vaccine tests |
Date | |
Source | March of Dimes |
Author | March of Dimes |
Permission
( Reusing this file ) |
no renewal per search; The image contains readable text of headlines only. As a collage or collection of such front pages, the photo is an original image by the photographers and would not require permission from any of the newspapers. It is also of low resolution. |
Licensing
Public domain Public domain false false |
This work is in the
public domain
because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the
copyright was not renewed
. For further explanation, see
Commons:Hirtle chart
and
the copyright renewal logs
. 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.
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