On The Mark Articles, The Sports Column
Kapp-less 1970 Minnesota Vikings Didn't Go All the Way - The Sports Column
Former NFL quarterback Joe Kapp dead at 85
The Minnesota Vikings in the 1970s: A Trip Down Memory Lane
The Free Agent - Cal Alumni Association
Heritage Uniforms and Jerseys and Stadiums - NFL, MLB, NHL, NBA, NCAA, US Colleges: Minnesota Vikings Uniform and Team History
Joe Kapp's Lawsuit Paved the Way for N.F.L. Free Agency - The New York Times
Throwback Thursday: Vikings vs. Joe Kapp & The Patriots, 1970 - Minnesota Vikings Chat
Vikings Mourn Passing of Legendary Quarterback Joe Kapp