Quantities and Units Part 6: Light and related electromagnetic radiations. 

 - Nairobi   KEBS  2005 
<br/><br/><label>ISBN: </label>KS ISO 31-6:1992 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ECONOMICS.
<br/><br/><label>Dewey Class. No.: </label>539.2 KEN