Urdu encyalopeadia tabiyaat 

 -  1969 
<br/><br/><label>Standard No.: </label>307828 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PHYSICS
<br/><br/><label>Dewey Class. No.: </label>CK, 168K9.1