TY - BOOK AU - Gupta, Piyush. AU - Ghai, .O.P. TI - Textbook of preventive social medicine SN - 8123914571 AV - RA 425 .G96 2007 PY - 2007/// CY - New Delhi PB - CBS publishers & distibutors KW - Preventive social medicine N1 - includes index ER -