Topps - Wikipedia
Topps Chewing Gum (Bazooka Gum Vignette) - New York 1978
Topps Chewing Gum, Inc.: The Hidden Treasure
Bowman v. Topps: Winning the Battle and Losing the War – SABR's
Issued by Topps Chewing Gum Company
Wacky Packages' make a comeback
History of Topps Stock: Topps Goes Public - One Million Cubs Project
Topps entered baseball card market with first set in 1951
Issued by Topps Chewing Gum Company
Topps Bubble Gum - Snack History
Issued by Topps Chewing Gum Company