- Motion Picture Classic (US)"Them Were the Happy Days; The Custard Pie Era [gave up pictures for real estate]"February 1927 · pg. 30-31, 67, 85 · by: Bert Ennis
- Moving Picture World (US)"Guy Coombs"October 16, 1915 · pg. 426, ill
- Motion Picture Magazine (US)"Brief Biographies of Popular Players"June 1915 · Iss. IX, pg. 108
- New York Dramatic Mirror (US)"Gossip of the Studios [will continue with Kalem]"August 5, 1914 · pg. 23:2
- New York Dramatic Mirror (US)"Coombs Heads Own Co.; Kalem Star to Be Featured by New Organization with Strong Backing"July 29, 1914 · pg. 24:1
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