000 00241nam a2200073 4500
080 _a
_b
245 _aIS: 2720-PART 25-1982 Methods of test for soils part xxv: Determination of silica sesquioxide ratio
100 _aBUREAU OF INDIAN STANDARDS
260 _aNEW DELHI
_bBIS
_c1983
300 _a7p
999 _c36264
_d36264