Fleer Corporation v. Topps Chewing Gum, Inc. and Major League Baseball Players Association, 658 F.2d 139, 19–21, 57 (United States Court of Appeals, Third Circuit. 1981).
Vrechek, George (December 3, 2008). "Philly Phavorite: Irv Lerner". F+W Media, Inc. Sports Collectors Digest. Archived from the original on July 16, 2011. Retrieved May 23, 2010.
Vrechek, George (December 3, 2008). "Philly Phavorite: Irv Lerner". F+W Media, Inc. Sports Collectors Digest. Archived from the original on July 16, 2011. Retrieved May 23, 2010.