Football on Thanksgiving: An American Tradition
1980 Bears Lions Thanksgiving Classic
The history of Thanksgiving Day football
Turkeyball The New Yorker
Why the Cowboys and Lions always play on Thanksgiving Day, NFL teams' records on the holiday
How the NFL Popularized Thanksgiving Day Football
NFL Thanksgiving Games: History, traditions and best moments - ESPN
No high school games on Thanksgiving Day? Yes, it's historic - The Boston Globe
Ravens Rewind: Thanksgiving History - PressBox
THANKSGIVING AND FOOTBALL: IT'S AN OLDER TRADITION THAN YOU THINK