"PHMC Historical Markers Search". Pennsylvania Historical and Museum Commission. Commonwealth of Pennsylvania. Archived from the original(Searchable database) on March 21, 2016. Retrieved September 28, 2015.
"PHMC Historical Markers Search". Pennsylvania Historical and Museum Commission. Commonwealth of Pennsylvania. Archived from the original(Searchable database) on March 21, 2016. Retrieved September 28, 2015.
"Stadium Facts". Lincoln Financial Field. Archived from the original on May 29, 2014. Retrieved May 9, 2014.