TY - BOOK AU - Jekel, James F. AU - Elmore, Joann G. AU - Katz, Donald L. TI - Epidemiology biostatistics and preventive medicine SN - 9780721652580 U1 - 614.44 PY - 1996/// CY - Philadelphia PB - W. B. Saunders KW - Preventive Medicine KW - Medical Sciences ER -