Joe Kapp, Quarterback Who Led Vikings to Super Bowl IV, Dies at 85 - The New York Times
1998 NFC Championship Game - Wikipedia
Frustrated Vikings fans edit John DeFilippo's Wikipedia page - Bring Me The News
Minnesota Vikings, Packers Wiki
Minnesota Vikings Archives - EssentiallySports
Minnesota Vikings – Wikipedia
The All-Time NFL Undrafteds Team - Rick Gosselin
Aaron Rodgers - Wikiwand
1969 NFL season - Wikipedia
Last Kings of the Old NFL: The 1969 Minnesota Vikings: Duncan, Mr. Pat: 9781500813567: : Books