Football (Professional) - Encyclopedia of Greater Philadelphia
NFL Timeline, with Map: 1920-1933 / A history of the Dayton Triangles' franchise; and a brief mention of the 1926 NFL-champions the Frankford Yellow Jackets, and the 1928 NFL-champions the Providence Steam
A history of the Philadelphia Eagles
Latinos of the Gridiron - Legends of the Game
Philadelphia Eagles - Stadium History
How the Philadelphia Yellow Jackets became the Philadelphia Eagles
Most rushing TDs by a team: How Eagles' Jalen Hurts, Miles Sanders, broke 99-year-old NFL record
A year in the life of a librarian in the Genealogy Division of the Indiana State Library, part deux
Ask Farmer: Have there ever been games played on Tuesday, Wednesday or Friday? - Los Angeles Times
Frankford Yellow Jackets
Old Images of Philadelphia - Frankford Yellow Jacket Stadium in the late 1920s. The 50 yard line was in the general area of Charles St. and Harbison Ave. The Yellow Jackets played
Unearthing A Lost Temple
Philadelphia Eagles, History & Notable Players