NYC sports fans have checkered history of storming field
Shibe Park rooftop fans (1913, Philadelphia Athletics, Philadelphia Phillies)
1926 NFL FRANKFORD YELLOW JACKETS FOOTBALL TEAM SWEATER-PHILADELPHIA EAGLES
A look back at Shibe Park – MATT VEASEY
Frankford, Philadelphia - Wikipedia
Lost Ballparks Postcard History
How the Philadelphia Yellow Jackets became the Philadelphia Eagles
How the Philadelphia Yellow Jackets became the Philadelphia Eagles
Championship City Frankford Yellow Jackets - Edge of Philly Sports Network
Frankford Yellow Jackets - Wikipedia
Historic hits - Northeast Times