000 00269nam a2200109Ia 4500
008 160710s1940 xx 000 0 und d
100 _aLANGSDORF ,A.S
245 _aPRINCIPLES OF DIRECT CURRRENT MACHINES
260 _bMCGRAW HILL
_c1940
300 _a746
942 _2ddc
_cB
999 _c6773
_d6773