TY  - BOOK
ED  - Bureau of Indian Standards
TI  - Control switches (switching devices for control and auxiliary circuits including contactor relays) for voltages up to and including 1000 V AC and 1200 V DC, Part III:rotary control switches
U1  - 621.316.544.1 B. I. S. 
PY  - 1980///
PB  - Bureau of Indian Standards
KW  - Manual
ER  -