TY - BOOK AU - Friss,Robert H. AU - Sellers,Thomas A. TI - Epidemiology for public health practice SN - 0-8342-1178-5 U1 - 614.4 PY - 1999/// CY - Maryland PB - Aspen Publishers KW - Epidemiology KW - Public health personnel KW - Public Health N1 - Includes bibliographical references and index ER -