Negro league baseball - Wikipedia
6 Decades Before Jackie Robinson, This Man Broke Baseball's Color Barrier
Before Jackie: Baseball's Color Line – Society for American Baseball Research
The Role of Education in Pittsburgh's Black Renaissance - Bloomberg
Jackie Robinson becomes first African American player in Major League Baseball, April 15, 1947
Brushing Back Jim Crow - UVA Press
The New A League of Their Own Takes on Jim Crow–Era Racism in Women's Baseball
Racial segregation in the United States - Wikipedia
Before Jackie: Baseball's Color Line – Society for American Baseball Research
African American history - Wikipedia
Baseball Rights a Wrong by Adding Negro Leagues to Official Records - The New York Times
The History of Baseball and Civil Rights in America
The Case for Reparations in Tulsa, Oklahoma
The History of Baseball and Civil Rights in America