Category:No local image but image on Wikidata. Just look at one of these articles, then open the "Wikidata item" link in the toolbar and see if there is an appropriate photo in commons.
This work is in the public domain because it was
published in the United States between 1929 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.
PD-USPublic domain in the United States//en.wikipedia.org/wiki/User:GRuban/Images
This work is in the public domain in the United States 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. Unless its author has been dead for the required period, it is copyrighted in the countries or areas that do not apply the
rule of the shorter term for US works, such as Canada (50 pma), Mainland China (50 pma, not Hong Kong or Macao), Germany (70 pma), Mexico (100 pma), Switzerland (70 pma), and other countries with individual treaties. See
Commons:Hirtle chart for further explanation.
PD-USPublic domain in the United States//en.wikipedia.org/wiki/User:GRuban/Images
This work is in the public domain because it was published in the United States between 1978 and March 1, 1989 without a copyright notice, and its copyright was not subsequently
registered with the U.S. Copyright Office within 5 years. It is not in the public domain in the following countries that do not apply the
rule of the shorter term for US works: Canada, China (not Hong Kong, Macao or Taiwan Area), Germany, Mexico, Switzerland, and other countries with individual treaties. See
this page for further explanation.
PD-USPublic domain in the United States//en.wikipedia.org/wiki/User:GRuban/Images
"A notice of copyright on the dust jacket of a book is not an acceptable notice for the book, because the dust jacket is not permanently attached to the book. Likewise, a notice appearing in a book is not an acceptable notice for the dust jacket or any material appearing on that dust jacket, even if the book refers to the jacket or material appearing on the jacket.".
Internet Archive Copyright renewal records:
https://archive.org/details/copyrightrecords has through 1978; search in text, not metadata, look up to 28 years after initial publication.
https://cocatalog.loc.gov/ has 1978-, sort by original dates, renewals will be earlier, and registration numbers will start with RE.
Unlike works of the U.S. Government, works produced by contractors under government contracts are protected under U.S. Copyright Law. ... The ownership of the copyright depends on the terms of the contract.
Oak Ridge National Laboratory (ornl.gov) seems all right:
https://www.ornl.gov/ornl/contact-us/Security--Privacy-Notice Copyright status Documents provided from the web server were sponsored by the U.S. Government ... Unless otherwise noted, they have been placed in the public domain, although we request the following credit line be used when documents or figures are used elsewhere: “Courtesy of Oak Ridge National Laboratory, U.S. Dept. of Energy.
https://www.voanews.com/s - note that that most photos on site are from AP or Reuters, so not public domain - look for VOA watermark or label. VOA videos are also good.
Project Gutenberg (Google Search, because the onsite search is terrible) find a book, either go to the More files... section, look in the Images folder to see whether there are any, or at the HTML version (to see the images in context)
YouTube (The Google image search failed in summer 2017, soon after I left, and hasn't been fixed since, despite my writing my old team)