000 00241nam a2200073 4500
080 _a
_b
245 _aIS: 11900 - 1986; Specification for tungsten rods and tungsten wire for lamps and electron devices
700 _aBureau of Indian Standards
260 _aNew Delhi
_bBIS
_c1986
300 _a15p
999 _c34708
_d34708