Urdu science encyclopedia  illustrated (volume 4)  [Book] : 

 - Lahore: :  Urdu Science Board,  2007. 
 - 617-808 p. 
<br/><br/> All. 
<br/><br/><label>ISBN: </label>969477117x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclopedias---Science.--Urdu.
<br/><br/><label>Dewey Class. No.: </label>500.3