Bails, Jerry; Ware, Hames (eds.). "Gleason, Lev". Who's Who of American Comic Books, 1928–1999. Archived from the original on September 8, 2015. Retrieved January 8, 2014.
Batsford entry, Who's Who of American Comic Books, 1928–1999. Accessed Nov. 15, 2018.
Jay, Alex; Holtz, Allan (June 19, 2013). "Ink-Slinger Profiles: Fred Meagher". Stripper’s Guide to Newspaper Comics History. Retrieved September 20, 2025.
Astor, Dave. "Goldberg To Retire From United Media,"Archived 2017-12-07 at the Wayback MachineEditor & Publisher (December 17, 2001): "The executive joined United in 1972 when it bought Bell McClure Syndicate and North American Newspaper Alliance, where Goldberg was president."
"United Feature Syndicate Buys Metropolitan Service From Elser: Both Firms Will Retain Separate Identities, With Elser Remaining as Vice-President — Monte Bourjaily to Direct Both Organizations," Editor & Publisher (March 15, 1930). Archived at "News of Yore 1930: Another Syndicate Gobbled,"Stripper's Guide (May 4, 2010).
Bails, Jerry; Ware, Hames (eds.). "Gleason, Lev". Who's Who of American Comic Books, 1928–1999. Archived from the original on September 8, 2015. Retrieved January 8, 2014.
Astor, Dave. "Goldberg To Retire From United Media,"Archived 2017-12-07 at the Wayback MachineEditor & Publisher (December 17, 2001): "The executive joined United in 1972 when it bought Bell McClure Syndicate and North American Newspaper Alliance, where Goldberg was president."