Indian Standard : quantities and units - part 13  light and related electromagnetic radiations 

 - New Delhi  Bureau of Indian Standards  1997 
 - 18p.  
<br/><br/> IS 1890 (part 13) : 1997, ISO 31-13 : 1992 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Indian Standards