TY - BOOK AU - Hennekens,Charles H AU - Buring,Julie E AU - Mayrent,Sherry L TI - Epidemiology in medicine SN - 0316356360 (pbk.) PY - 1987/// CY - Boston PB - Little, Brown KW - Epidemiology KW - Epidemiologic Methods N1 - Includes index; Includes bibliographical references ER -