Rao, P Ramakrishna. <br/><br/>
Digital communication / 
P Ramakrishna Rao. 
 - India :  McGraw Hill Education,   c2011. 
 - xix, 577 p. :  ill. ;  25 cm. 
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<br/><br/><label>ISBN: </label>9780070707764 
<br/><br/><label>Dewey Class. No.: </label>621.384