Jackie Robinson broke baseball's color barrier but these Black players still faced racism
VOICES: Jackie Robinson Day is much bigger than baseball - The Atlanta Voice
Negro League Baseball, Black Community, and The Socio-Economic Impact of Integration – Society for American Baseball Research
Jackie Robinson integrates baseball 73 years ago—Daily Worker archive – People's World
Baseball Integration, 1947-1986 – Society for American Baseball Research
Integrating Baseball, before Jackie Robinson - JSTOR Daily
Jackie Robinson in 1946: Integrating the Minor Leagues – Society for American Baseball Research
Breaking the barrier: Integrating the major leagues one team at a time 1947-1959
Baseball Integration, 1947-1986 – Society for American Baseball Research
Baseball - Integration, Jackie Robinson, MLB
LEADING OFF: MLB celebrates Robinson 75 years after debut - The San Diego Union-Tribune
Baker laments lack of blacks in MLB on Jackie Robinson Day - The Sumter Item
AFTER JACKIE: New book highlights 15 black pioneers who followed Jackie Robinson's path to major leagues - Sports Collectors Digest
Integrating Baseball, before Jackie Robinson - JSTOR Daily