Before Brooklyn: the secret heroes who helped break baseball's color barrier, MLB
Opinion: Jackie Robinson was a true sports hero : NPR
Did Jackie Robinson Really Break Baseball's Color Barrier?
Crossing the Color Barrier: Jackie Robinson and the Men Who Integrated Major League Baseball - LA84 Foundation
Play Ball! Paving the way for Jackie Robinson National Museum of African American History and Culture
67 years after Jackie Robinson broke the color barrier, Major League Baseball looks very different
Home - Jackie Robinson
Robinson, Jackie Baseball Hall of Fame
On this day in history, Jan. 31, 1919, Jackie Robinson is born in Georgia — baseball pioneer, WWII veteran
1947: Robinson breaks baseball color barrier - Mississippi Today