Levinsky fought an estimated five hundred fights in The Jewish Boxer's Hall of Fame, Blady, Ken, (1988) Shapolsky Publishers, Inc., New York, NY, pgs. 90
Panama Joe trained Dempsey for Billy Miske in"Panama Joe Gans". Boxing Record. Cyber Boxing Zone. Retrieved August 8, 2016.
harrygreb.com
"Harry Greb". Boxing Record. BoxRec. Retrieved March 7, 2016.
imdb.com
Hollandersky's appearance in "Road House Nights" appears in third edition of his biography and a list of the cast of "Road House Nights" in "Roadhouse Nights (1930) IMDB". imdb. Retrieved March 7, 2016.
Edson was ghost writer in"Biographical Sketch". Charles Leroy Edson Papers (coll. 27). Kansas Historical Society. Retrieved August 4, 2015.
Edson was ghost writer in"Biographical Sketch". Charles Leroy Edson Papers Microform. Kansas Historical Society. Retrieved August 4, 2015.
usmilitariaforum.com
Morris was on the cruise of the Great White Fleet aboard the USS Kearsarge, full naval service record in "Chief Morris Uniform". Chief Morris. U.S. Military Forum. June 15, 2008. Retrieved July 3, 2016.