000 00264nam a2200085 4500
080 _a621.313.13
_bHEU.61
245 _aMagnetic control of industrial motors Part 3 direct current motor controllers
100 _aHeumann, Gerhart W
260 _aNew York
_bJohn Wiley & sons
_c1961
300 _axv+295p
999 _c24018
_d24018