000 00287nam a2200109Ia 4500
100 _aRatan, Vidya
942 _cBK
245 _aHandbook of preventive and social medicine
_bhygiene and public health
260 _aJaypee Brothers, New Delhi
_c1984
082 _a614 Rat
300 _axvi, 336
999 _c21789
_d21789