TY  - BOOK
AU  - Heumann, Gerhart W.
TI  - Magnetic Control of Industrial Motors 
U1  - 621.4672 
PY  - 1961///
CY  - New York : 
PB  - John Wiley, 
KW  - Electric Controller
N1  - NN; Pt. 1. Alternating Current Control Devices and Assemblies
ER  -