Joe Kapp, former All-American at Cal, QB for Vikings, dies at 85 - ESPN
Joe Kapp's style wasn't pretty, but the Hart High product persevered – Daily News
Gallery: Joe Kapp, former Vikings QB who led team to first Super Bowl, dies at 85
Vikings Mourn Passing of Legendary Quarterback Joe Kapp
The Chiefs' last Super Bowl appearance featured gambling accusations and a monumental upset - The Washington Post
Joe Kapp, who led the Vikings to the franchise's first Super Bowl, dies at age 85
The most memorable seasons by NFL backup quarterbacks
Ex-Vikings star Joe Kapp - the only QB to appear in Super Bowl, Rose Bowl and Grey Cup - dies at 85
Joe Kapp, Quarterback Who Led Vikings to Super Bowl IV, Dies at 85 - The New York Times