000 00287nam a2200121Ia 4500
100 _aJames J Barr
245 _aPrinciples of Direct Current Electrical Engineering
250 _a2
260 _c1960
_aLondon
_bSIR Isaac Pitman & Sons
300 _ax+486
700 _aBolton DJ
942 _cBK
999 _c563
_d563