The History of Pro Football At Greensburg, Pennsylvania (1894-1900) | journal=Coffin Corner | publisher=Professional Football Researchers Association | volume= | issue=Annual | year=1983 | pages=1–14 | url=http://www.profootballresearchers.org/Coffin_Corner/05-An-165.pdf | authors=Van Atta, Robert}}
Latrobe, PA: Cradle of Pro Football| journal=Coffin Corner | publisher=Professional Football Researchers Association | volume=2 | issue=Annual | year=1980 | pages=1–21 | url=http://www.profootballresearchers.org/Coffin_Corner/02-An-052.pdf%7C first=Robert | last=Van Atta}}