George Halas
Further Information
Books
Sullivan, George. Pro Football's All-time Greats. New York: G. P. Putnam's Sons, 1968.
Vass, George. George Halas and the Chicago Bears. Chicago: Henry Regnery Company, 1971.
Periodicals
Gietschier, Steve. "The Most Powerful People In Sports For The 20th Century." Sporting News (December 20, 1999).
Other
"George S. 'Papa Bear' Halas Sr." http://www.geocities.com/dibears201.geo/halas.html (September 17, 2002).
"No. 26—Bob Zuppke," The Pigskin Post. http://www.pigskinpost.com/no_26_-_bob_zuppke.htm (October 2, 2002).
Additional topics
Famous Sports StarsFootballGeorge Halas - Fate Intervened, The 1920s: New League, New Team, Chronology, Related Biography: Coach Bob Zuppke