Summary
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Photograph of Lewis Sperry Chafer taken circa 1929. Unknown photographer. Found at http://library.dts.edu/Pages/TL/Special/80th.shtml
Chafer died in 1952 so there is no reasonable way to get a "free use" image of him.
Image fair use falls under Template:PD-Pre1978.
Licensing
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This image is in the public domain in the United States. In most cases, this means that it was first published prior to January 1, 1931 (see the template documentation for more cases). Other jurisdictions may have other rules, and this image might not be in the public domain outside the United States. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.
This work is in the public domain because it was published in the United States between 1931 and 1977 inclusive, without a copyright notice. Unless the author has been dead for several years, it is not in the public domain in countries that do not apply the rule of the shorter term for US works. This includes Canada, China (not Hong Kong, Macao, or Taiwan Area), Germany, Mexico, Switzerland, and other countries with individual treaties. See also further explanation.
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