NYT Obituaries on Twitter: "Jackie Robinson, first black baseball player in the major leagues, died on this day in 1972 https://t.co/nCrvzW0gw7 https://t.co/UyOdCFwk0r" / Twitter
Robinson debuts five days after signing with Dodgers | Baseball Hall of Fame
CAAM | #blackhistory: On April 10, 1947, Jackie Robinson becomes first black player signed to a Major League Baseball contract
Jackie Robinson was Not the First African American to Play Major League Baseball
Jackie Robinson and the Story of All Black Baseball (Step into Reading): O'Connor, Jim: 9780394824567: Books
Baseball Demographics, 1947-2016 – Society for American Baseball Research
Jackie Robinson's overlooked season in the Negro Leagues shaped his historic path to Major League Baseball - CBSSports.com
Jackie Robinson wasn't the first African American Major League player - The Washington Post
Deciphering baseball's shocking lack of black players | WBEZ Chicago
Robinson, Jackie | Baseball Hall of Fame
67 years after Jackie Robinson broke the color barrier, Major League Baseball looks very different | Pew Research Center