Rai, Anil Kumar <br/><br/>
संचार परिधि एवं विस्तार 
 Sanchar paridhi evam vistar 

 - New Delhi:   University Publications,   2007 
 - v, 335p.  
<br/><br/><label>ISBN: </label>81-7555-150-x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science 
<br/><br/><label>Universal Decimal Class. No.: </label>659.3  / P7