Zwerling, Craig, Nancy L. Sprince, James Ryan, and Michael P. Jones. "Occupational Injuries: Comparing the Rates of Male and Female Postal Workers." American Journal of Epidemiology 138/1 (1993): 46-55.

Zwerling, Craig, Nancy L. Sprince, James Ryan, and Michael P. Jones. "Occupational Injuries: Comparing the Rates of Male and Female Postal Workers." American Journal of Epidemiology 138/1 (1993): 46-55.