TY  - BOOK
AU  - Case,John[from old catalog]
TI  - The theory of direct-current dynamos and motors,
U1  - 621.3132 
PY  - 1921///
CY  - Cambridge
PB  - W. Heffer & sons, ltd.
KW  - Electric generators
KW  - Direct current
KW  - Electric motors, Direct current
N1  - 0; 0; 0; 621_313200000000000_CAS
ER  -