Peter Dreier, Robert Elias - Baseball Rebels - The Players, People, and Social Movements That Shook Up The Game and Changed America-University of Nebraska Press (2022), PDF, American Civil War
Trevor Hoffman taking the mound to Hells Bells by ACDC
50 Moments: “Hells Bells” Debuts on Trevor Time, by FriarWire
San Diego Padres: Trevor Hoffman Enters MLB Hall Of Fame
Trevor Hoffman's Hell's Bells lifts Milwaukee Brewers in 9th
Topps & fathers & sons
Case Closed - Sports Illustrated Vault
15 Reasons to Keep Rooting for the San Diego Padres, News, Scores, Highlights, Stats, and Rumors
Well Hells Bells, Trevor Hoffman's keeping busy in baseball
Trevor Hoffman Signed Padres 12x18 Photo Inscribed Hells Bells (PSA COA)
Hoffman keeping very busy