An exchange on risk compensation & helmet wearing between Diane C. Thompson, Robert S. Thompson, Frederick P. Rivara, and Mayer Hillman & John Adams.. June 2001
Paul Gannon, Nov 2000.
Paul Gannon and Paul Gasson,2000
Mayer Hillman, July 2000
Mayer Hillman, June 2000 — Camden Cyclists
Paul Gannon, May 1999
Paul Gannon, August 1999