1. Current estimates from the National Health Interview Survey, United States, 1981;National Center for Health Statistics,1982
2. The content of ambulatory medical care in the United States: an interspecialty comparison;Rosenblatt;N Engl J Med,1983
3. Use of antimicrobial drugs in general hospitals. I. Description of population and definition of methods;Townsend;J Infect Dis,1979
4. Annual summary 1982; reported morbidity and mortality in the United States;Centers for Disease Control;Morbid Mortal Weekly Rep,1983