PARK, K . PARK`S TEXT BOOK OF PREVENTIVE & SOCIAL MEDICINE / Textual Documents - 18 ED. - [s.l]: M/S BANARSIDAS BHENOT , , 2005. - 716 : : VI ; ; A4. PSM ISBN: 8190128280 Subjects--Index Terms: PREVENTIVE SOCIAL MEDICINE Dewey Class. No.: 614 / PAR