Top 10: Scariest hitters in secondary
Bookyear1889 hi-res stock photography and images - Alamy
Former Bears great Doug Plank: “Concussions were just mild inconveniences”
Ex-Bear Doug Plank after flipping truck: 'Your life flashes in front of you'
Chicago's Hyde Park Historical Society
History Archives - The Atavist Magazine
Watch MacArthur, American Experience, Official Site
Q & A: Former Bears cornerback Plank talks about his career
Ex-Bear Doug Plank puts his hat in ring for Illinois AD job - Chicago Sun- Times