TY - BOOK AU - Aschengrau,Ann AU - Seage,George R. TI - Essentials of epidemiology in public health SN - 0763725374 (pbk.) U1 - 362.10954 21 PY - 2003/// CY - Sudbury, Mass. PB - Jones and Bartlett KW - Epidemiology KW - Public health KW - Social medicine KW - Epidemiologic Methods N1 - Includes bibliographical references and index ER -