000 00273nam a2200109Ia 4500
008 160710s1951 xx 000 0 und d
100 _aADKINS,AND GIBBS
245 _aPOLYPHASE COMMUTATOR MACHINES
260 _bUNIVERSITY PRESS
_c1951
300 _a230+125
942 _2ddc
_cB
999 _c13100
_d13100