000 00316nam a2200121Ia 4500
008 160710s1940 xx 000 0 und d
082 _a621.3132 L28
100 _aLANGSDORF,ALEXANDER S.
245 _aPRINCIPLES OF DIRECT-CURRENT MACHINES
260 _bMCGRAW-HILL BOOK CO.
_c1940
300 _a746
942 _2ddc
_cB
999 _c16045
_d16045