TY  - GEN
ED  - BRITISH STANDARDS INSTITUTION
TI  - BS 4533 : Pt. 1 : Section 1.2 : 1971 : Specification for electric luminaires : general requirements and tests : classification of luminaires
PY  - 1971///
CY  - London
PB  - BRITISH STANDARDS INSTITUTION
N1  - STD1513
ER  -