National Baseball Hall of Fame - Dressed to the Nines - Parts of the Uniform
Pirates to wear No. 21 on Sept. 9 to honor Roberto Clemente - The San Diego Union-Tribune
2013 LAD Media Guide, PDF, Major League Baseball
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Pirates to wear No. 21 on Sept. 9 to honor Roberto Clemente - The San Diego Union-Tribune
Pittsburgh Pirates each don No. 21 to honor Roberto Clemente - ESPN
Mlb catchers hi-res stock photography and images - Alamy
50 years after his death, family and friends honor Pirates star and humanitarian Roberto Clemente — 'part of the soul of everybody in the city' - Pittsburgh Union Progress