John Racanelli – SABR's Baseball Cards Research Committee
How Upper Deck did the '70s
2011–present – SABR's Baseball Cards Research Committee
Loud and Clear: 1972 Topps Baseball Cards and Their Endearing Beauty
No-Hitters by Society for American Baseball Research - Ebook
Popularity of 1987 Topps Baseball set leads to interesting TTM project - Sports Collectors Digest
100 Things Pirates Fans Should Know & Do Before They Die by Pittsburgh Post-Gazette, Steve Ziants - Ebook
1972 Topps Baseball: The Penultimate High
DiMaggio's really long streak – SABR's Baseball Cards Research Committee
Steve Arlin – Society for American Baseball Research
Diamond Dollars: The Economics of Winning in Baseball by Vince Gennaro - Ebook
How Upper Deck did the '70s
1972 Topps Baseball: The Penultimate High
Reviews and Testimonials from people who have bought from Dean's Cards
1969–1980 – Page 13 – SABR's Baseball Cards Research Committee