000 00297nam a2200109Ia 4500
008 220201s1996 xx 000 0 eng d
100 _aIS 11401 PART 2 1990
245 0 _aREQUIREMENTS FOR SLOW SAND FILTERS PART II
260 _aDELHI
_bBUREAU OF INDIAN STANDARD
_c1996
300 _a5
942 _2ddc
999 _c91906
_d91906