000 00310nam a2200121Ia 4500
008 220201s1952 xx 000 0 eng d
041 _aENG
100 _aSISKIND, CHARLES S
245 0 _aDIRECT CURRENT MACHINES
260 _aLONDON
_bTHAMES AND HUDSON PUBLISHING COMPANY
_c1952
300 _a319
942 _2ddc
999 _c40571
_d40571