Héroes de Cartón: A Cuban Collection – SABR's Baseball Cards Research Committee
SABR Century Project – Baseball Cards of 1921 – SABR's Baseball Cards Research Committee
The Most Conventional Set II – SABR's Baseball Cards Research Committee
SABR's Baseball Cards Research Committee
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cardstatman – SABR's Baseball Cards Research Committee
SABR 50 at 50: Baseball Cards – Society for American Baseball Research
SABR Century Project – Baseball Cards of 1921 – SABR's Baseball Cards Research Committee
1994 Upper Deck Baseball All-Time Heroes #143 Toby Harrah
Cuban Baseball Cards
SABR Century Project – Baseball Cards of 1921 – SABR's Baseball Cards Research Committee
