000 00279nam a2200097Ia 4500
008 220201s1987 xx 000 0 eng d
100 _aBUREAU OF INDIAN STANDARD
245 0 _aGRAPHICAL SYMBOLS FOR DIAGRAMS IN THE FIELD OF ELECTROTECHNOLOGY
260 _bB.I.S
_c1987
942 _2ddc
999 _c98294
_d98294