42: A Story of Baseball's Integration - Canadian Baseball Hall of Fame and Museum
Connie Johnson – Society for American Baseball Research
Polk well represented in Negro League baseball history
42: A Story of Baseball's Integration - Canadian Baseball Hall of Fame and Museum
MORE
How Larry Doby broke color barrier in American League
Our Stories Baseball Hall of Fame
News Baseball Hall of Fame
1942 Negro Leagues World Series Bobblehead Featuring Satchel Paige and Josh Gibson Unveiled
Jackie Robinson: Most Up-to-Date Encyclopedia, News & Reviews
Canadian Baseball Hall of Fame & Museum - Attractions - Baseball Life
Karl Lindholm: The third front of baseball's integration: Trois Rivières, 1946 - Addison Independent
New Hampshire town recognized for role in racially integrating baseball