The Team That Changed Baseball: Roberto Clemente and the 1971 Pittsburgh Pirates: Markusen, Bruce: 9781594160899: : Books
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Pirates had MLB's first all-minority lineup
Pittsburgh Pirates - Wikipedia
Remembering the 1971 All-Star Game: A night of legends, doing legendary things
50 Years Later, the Pirates' Lineup of Color Still Resonates - The New York Times
September 1, 1971: Pirates field first all-Black lineup in baseball history – Society for American Baseball Research
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