000 00296nam a2200109Ia 4500
008 220201s1996 xx 000 0 eng d
100 _aIS 11401 PART I 1985
245 0 _aREQUIREMENTS FOR SLOW SAND FILTERS PART I
260 _aDELHI
_bBUREAU OF INDIAN STANDARD
_c1996
300 _a8
942 _2ddc
999 _c91905
_d91905