TY  - BOOK
AU  - Bureau of Indian Standards
TI  - IS: 3231 (Part 1/Sec. 1) - 1986 (Reaffirmed 1992); Specification for electrical relays for power system protection Part 1 General requirements Section 1 contact performance
PY  - 1987///
CY  - New Delhi
PB  - BIS
ER  -