000 00295nam a2200109Ia 4500
008 220201s1960 xx 000 0 eng d
100 _aBarr, R & Bolton, DJ
245 0 _aPrinciples of direct current: Electrical Engg.
260 _bLondon: Sir Isaac Pitman
_c1960
300 _a486
942 _2ddc
999 _c71101
_d71101