TY  - BOOK
AU  - BUREAU OF INDIAN STANDARDS
TI  - IS:09921 (PART 4) - 1985; Specification for alternating current disconnectors(Isolators)and earthing switches for voltages above 1 ooo V Part 4; type tests and routine tests
PY  - 1985///
CY  - New Delhi
PB  - BIS
ER  -