Biswas Nripendra N <br/><br/>
Principles of telephony 

 - Bangalore  Radiant Books         1993 
 - 138p.  cm. 
<br/><br/><label>Standard No.: </label>28076 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ENGINEERING
<br/><br/><label>Dewey Class. No.: </label>D65,48, N3