000 00300nam a2200121Ia 4500
008 220201s1974 xx 000 0 eng d
041 _aENG
100 _aSONI, O P
245 0 _aELECTRICAL ENGINEERING
260 _aLONDON
_bTHAMES AND HUDSON PUBLISHING COMPANY
_c1974
300 _a292
942 _2ddc
999 _c47979
_d47979