TY  - BOOK
ED  - National Electrical Manufacturers Association.
TI  - NEMA industrial control standards ..
T2  - Its Publications,
AV  - TK7 .N35 no. 17
U1  - 621.3174 
PY  - 1933///
CY  - New York
PB  - National electrical manufacturers association
KW  - Electric controllers
ER  -