M Cook

Relationship of helmet use and head injuries among motorcycle crash victims in El Paso County, Colorado, 1989-1990.

L Stallones, L. Stallones, B. Gabella, 1995, Accident; analysis and prevention.

Assessment of blood lead levels in children living in a historic mining and smelting community.

R E Hoffman, W R Chappell, E. Mangione, 1993, American journal of epidemiology.