TY  - BOOK
AU  - Bureau of Indian Standards
TI  - IS:01890 (part 6) - 1983/ISO 31 - 6 - 1980 (Reaffirmed 1989); Quantities, units and symbols Part 6 light and related electromagnetic radiations
PY  - 1983///
CY  - New Delhi
PB  - BIS
ER  -