Cards That Never Were: Barrier Breakers: 1955 Elston Howard - New York Yankees
Barrier Breakers Timeline - NLBM
Barrier Breakers Timeline - NLBM
Elston howard hi-res stock photography and images - Alamy
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1959 Topps Elston Howard
1960 Topps Elston Howard
New York Yankees - Wikipedia
Most underrated Hall of Famers
Players who broke color barrier for every team
Clemente: The Passion and Grace of Baseball's Last Hero by David Maraniss, Paperback
Let's Remember Elston Howard and the Yankees' Historic Day, April 14, 1955
Cards That Never Were: Barrier Breakers: 1954 Carlos Paula - Washington Senators
Elston Howard broke the Yankees' color-barrier in 1955 - Sports Illustrated