TY  - BOOK
AU  - Langsdorf, Alexander S.
TI  - Principles of direct current machines
U1  - 621.3132 LAN 
PY  - 1940///
CY  - New York
PB  - McGraw-Hill Book Company
KW  - Electric machinery
KW  - Electromechanical energy conversion
KW  - DC motors and generators
N1  - Includes index
ER  -