Doug Griffin - Trading/Sports Card Signed
Doug Griffin Gallery - 1974
Doug Griffin Gallery Trading Card Database
Granny's Auction House, Inc Auction Catalog - November 2022
Doug Griffin Baseball Cards
Calaméo - 2022 Summer Auction
1975 O PEE CHEE #454 DOUG GRIFFIN RED SOX PSA 9 MINT 427 POP 2
Ezbarterbid, LLC Auction Catalog - Vintage Collectibles and Sports
1982 TOPPS #90 NOLAN RYAN HOF ASTROS PSA 10 GEM-MT 663 - Duck's Dugout
The Curious Thing About 1979 Topps Baseball Sell Sheets – Post War