Dallas Cowboys - Wikipedia
Official Super Bowl 51 Game Program
NFL history: 100 people who shaped the league, pro football - Sports Illustrated
Today in Pro Football History: 01/01/2012 - 02/01/2012
NFL history: 100 people who shaped the league, pro football - Sports Illustrated
2015 Vanderbilt Football Fact Book by Vanderbilt Commodores - Issuu
2011 Vanderbilt Football Fact Book by Vanderbilt Commodores - Issuu
List of Stanford University people - Wikipedia
World's fastest human finds the end zone
Today in Pro Football History: 1966: Hayes & Cowboys Overcome Taylor & Redskins in Aerial Shootout
World's fastest human finds the end zone
NFL History: 100 objects that tell the story of football - Sports Illustrated