1981 O-Pee-Chee Baseball Checklist, Team Set Lists, Price Guide Access
Cardboard appreciation: 1981 Topps Traded Darrell Porter
Leon Durham Memorabilia, Autographed Leon Durham Collectibles
1981 Fleer Baseball Checklist, Team Set Lists, Variations, Rookie Cards
leon durham Values - MAVIN
Cubs historical sleuthing: Leon Durham edition - Bleed Cubbie Blue
The Snorting Bull: A 1980s Card Part 33 - 1981 Topps Bob Forsch
1981 Topps # 756 T Leon Durham Chicago Cubs (Baseball Card) NM/MT Cubs : Collectibles & Fine Art
Andre Dawson Price List - Supercollector Catalog
1984 Topps Tiffany Leon Durham Chicago Cubs #565