Baseball cards of the Negro Leagues – SABR's Baseball Cards Research Committee
SABR's Baseball Cards Research Committee
SABR 50 at 50: Baseball Cards – Society for American Baseball Research
SABR's Baseball Cards Research Committee
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The Year in Review: 2021 Collecting Highlights – Jason Cards
From the Negro League to MLB – SABR's Baseball Cards Research Committee
SABR 50 at 50: Baseball Cards – Society for American Baseball Research
SABR 50 at 50: Baseball Cards – Society for American Baseball Research
SABR's Baseball Cards Research Committee
SABR's Baseball Cards Research Committee
The Negro Leagues are Major Leagues: Essays and Research for Overdue Recognition (Champions of Black Baseball): Forman, Sean, Gibson, Sean, Jones, Adam, Lester, Larry, Peterson, Todd, Heaphy, Leslie, Burgos Jr., Adrian, Posnanski
Negro League Baseball Trading Cards – Parkside Collectibles
SABR Century Project – Baseball Cards of 1921 – SABR's Baseball Cards Research Committee
Negro League Baseball Trading Cards – Parkside Collectibles
