000 00333nam a2200133Ia 4500
008 160710s1940 xx 000 0 und d
082 _a621.312 LAN
100 _aLANGSDOSF,ALEXANDER S.
245 _aPRINCIPLES OF DIREST-CURRENT MACHINES
250 _a6
260 _bMCGRAW-HILL BOOK CO.
_c1940
300 _a745
942 _2ddc
_cB
999 _c20750
_d20750