Indian Standards Institution <br/><br/>
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 

 - Indian Standards Institution, New Delhi  1969 
 - 51 
<br/><br/><label>Dewey Class. No.: </label>IS:3646(pt.III)-1968 621.321 I.S.I.