000 00329nam a2200133Ia 4500
008 220201s1977 xx 000 0 eng d
082 _a628
100 _aBharat Singh & Gupta, DL
245 0 _aElements of Public Health Engineering
250 _a2nd
260 _bKatson Publishing House
_c1977
300 _a234
942 _2ddc
999 _c80626
_d80626