A Packers legend is selling his Super Bowl I ring: What's it worth? - The Washington Post
5 NFL Super Bowl champions who sold their rings
Jerry Kramer's NFL Super Bowl ring and Vince Lombardi letter up for auction
If These Walls Could Talk: Green Bay Packers: Stories from the Green Bay Packers Sideline, Locker Room, and Press Box: Reischel, Rob, Larrivee, Wayne: 9781629372792: : Books
Kramer's Super Bowl I ring to be auctioned
NFL - A chilling recollection of classic 'Ice Bowl' - ESPN
Herb Adderley, Hall of Famer for Cowboys, Packers, dies at 81 - Los Angeles Times
The Wearing Of the Green (and Gold): Jerry Kramer's Rings