October 17, 1971: Blass, Clemente lead Pirates to victory in World Series Game 7 – Society for American Baseball Research
Ranking every World Series in MLB history - ESPN
1971 Pittsburgh Pirates Team Issue Roberto Clemente PSA NM 7. , Lot #52070
Pittsburgh Pirates 1971 World Series Champions Lot of (21) Different Clemente
Lot Detail - 1971 ROBERTO CLEMENTE PITTSBURGH PIRATES GAME WORN HOME JERSEY FROM WORLD SERIES CHAMPIONSHIP SEASON (MEARS A7.5)
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Clemente's home run powers Pirates to World Series win
Reunion of Pirates' 1971 World Series champions brings back memories
1971 Pirates were special in many ways, John Sacco
1971 Topps Baseball 630 Roberto Clemente Pittsburgh Pirates - Norway
Lot Detail - 1971 Roberto Clemente Pittsburgh Pirates World Championship Ring (Salesman's Sample)
Lot Detail - Circa 1971 Roberto Clemente Pittsburgh Pirates Game-Used Home Jersey (Scarce)
1971 Pittsburgh Pirates (Related Stories) - Sports Illustrated
Reunion of Pirates' 1971 World Series champions brings back memories