These are the 7 teams that have repeated as champions in the Super Bowl era
Every Super Bowl Ranked, From Worst to Best of All Time - Men's Journal
Top NFL Coaches of All Time: Reid On the Rise
Pro Football Journal: Defensive Dominance: Steelers 1972-76 and Bears 1984-88
Vintage Pittsburgh Steelers Image Gallery
The 25 most dominant NFL teams of the last 50 years - The Athletic
Don Shula Taylor Blitz Times
The 50 Greatest NFL Quarterbacks of All-Time – New Arena
32 Stats On Don Shula's Historic Career