NFL has produced memorable Christmas day games, Etvarsity
Times Leader 07-17-2012 by The Wilkes-Barre Publishing Company - Issuu
100 GREAT NFL-NBC MOMENTS - NBC Sports PressboxNBC Sports Pressbox
Calaméo - KC STUDIO SEPT/OCT 2023
Rise of the Dolphins by Dave Morine - Ebook
Dolphins and Chiefs played longest game in NFL history on Christmas 1971
The Longest Game in NFL History Took Place on Christmas Day
September: Chiefs Fan Guide by Kansas City Magazine - Issuu
One & Done: Ed Podolak's Christmas marathon game for the 1971 Kansas City Chiefs
On This Day In Sports: 2013
Chiefs are 1-1 on Christmas Day with one of most stinging losses in franchise history