000 00303nam a2200121Ia 4500
008 220201s1977 xx 000 0 eng d
082 _a628
100 _aBharat Singh & Gupta,DL
245 0 _aElements of Public Health engg
260 _bLudhiana:Katson pub house
_c1977
300 _a234
942 _2ddc
999 _c80334
_d80334