October 1, 1967: Roberto Clemente 'manages' Pirates in season

Pirates announce inaugural 19-member Hall of Fame class

August 1967 Sport Magazine - Roberto Clemente Newsstand No Label

Did Bill Mazeroski, a Pittsburgh Pirates Hall of Fame player, continually refer to fellow Pirates Hall of Famer Roberto Clemente as “Bob” throughout his career and after despite Clemente's objections? - Quora

Clemente, the Double Outsider - The New York Times

September 13, 1967: Roberto Clemente gets 5 straight hits, 4 RBIs against Reds – Society for American Baseball Research

Roberto Clemente: The King of Béisbol, History

Roberto Clemente Museum Exhibit Honors Baseball Great

Roberto Clemente remains Latino legend 50 years after death

Pittsburgh Pirates Mark 50 Years Since Historic All-Black And -Latino Lineup

Roberto Clemente: Career retrospective