000 00225nam a2200073 4500
080 _a
_b
245 _aIS: 6804 - 1972 : Specification for Glass Electrodes for Direct Reading pH Meter
700 _aINDIAN STANDARDS INSTITUTION
260 _aNew Delhi
_bBIS
_c1973
300 _a12p
999 _c26670
_d26670