Zijl, H. <br/><br/>
Manual for the illuminating engineer on large size perfect diffusors /  
by H. Zijl 
 - Eindhoven :   Philips,   1951 
 - 196 p 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ILUMINACION<br/>ILUMINACION INTERIOR
<br/><br/><label>Universal Decimal Class. No.: </label>628.9