Why do the Lions and Cowboys play on Thanksgiving every year? - DraftKings Network
5 Lesser known traditions from NFL Thanksgiving games - Sportskeeda Stories
National Football League - Wikipedia
Thanksgiving Football: A Long-Standing Tradition
The history of the Detroit Lions and Thanksgiving: Best, worst moments - Pride Of Detroit
The History of the NFL on Thanksgiving - Gang Green Nation
The 22 Best NFL Touchdown Celebrations of 2018
Early history of American football - Wikipedia
NFL Thanksgiving Games: History, traditions and best moments - ESPN
What days are NFL football on? - Quora
Why the Cowboys and Lions always play on Thanksgiving Day, NFL teams' records on the holiday