000 00227nam a2200073 4500
080 _a
_b
245 _aIS: 6616 - 1972; Specification for Ballasts for High Pressure Mercury Vapour Lamps
700 _aINDIAN STANDARDS INSTITUTION
260 _aNew Delhi
_bBIS
_c1972
300 _a29p
999 _c30113
_d30113