000 00258nam a2200085 4500
080 _a
_b
245 _aIS:1489-1991; Portland-pozzolana cement specification Part 1; Fly ash basic
100 _aBUREAU OF INDIAN STANDARDS
260 _aNEW DELHI
_bBIS
_c1991
300 _a7p
440 _vWith Amendment No.1-1991
999 _c36223
_d36223