000 00230nam a2200073 4500
080 _a
_b
245 _aIS: 1489 (Part 1) - 1991; Portland-pozzolana cement - Specification Part 1 Fly ash based
700 _aBureau of Indian Standards
260 _aNew Delhi
_bBIS
_c1991
300 _a7p
999 _c34880
_d34880