000 00298nam a2200121Ia 4500
008 220201s1962 xx 000 0 eng d
082 _bISI
100 _aI.S.I.
245 0 _aCode of practical for installations of index amplifires
260 _aDelhi
_bI.S.I.
_c1962
300 _a23
942 _2ddc
999 _c19351
_d19351