Vocational guide to mobile communications 
Tiwari, Ankit. 
 -  Venus Books,  2014 
 - 230 p. 
<br/><br/>
<br/><br/><label>ISBN: </label>978-8-18992251-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cellular telephones.
<br/><br/><label>Dewey Class. No.: </label>621.38 T623 2014