000 00219nam a2200073 4500
080 _a
_b
245 _aIS: 3812 - 1981; Specification for fly ash for use as pozzolana and admixture
700 _aBureau of Indian Standards
260 _aNew Delhi
_bBIS
_c1981
300 _a9p
999 _c33841
_d33841