"Plunkett mass set Thursday". Chicago Tribune. April 30, 1975. p. IV-13 – via Newspapers.com.("pioneer in the National Football League . . . In the 1920s, for a time, he owned the Milwaukee Brewers Football Club")
"Jule S. Plunkett". Chicago Tribune. September 18, 1994. p. II-6 – via Newspapers.com.("Joseph T. Plunkett, who was a pioneering founder of the National Football League")