TY  - BOOK
AU  - Indian Standards Institution
TI  - Indian standard code of practice for interior illumination part III calculation of coefficients of utilization by the BZ method: illuminating engineering sectional committee, ETDC 45
U1  - IS:3646(pt.III)-1968 621.321 I.S.I. 
PY  - 1969///
CY  - Indian Standards Institution, New Delhi
ER  -