TY - BOOK AU - Gordis,Leon TI - Epidemiology / by Leon Gordis SN - 072168338X PY - 2000/// CY - Philadelphia, Pa. PB - W.B. Saunders Company KW - Epidemiology KW - Epidemiologic methods N1 - Includes bibliographical references and index; Contents : The epidemiologic approach to disease and intervention--Using epidemiology to identify the cause of disease ER -