Roddy Dennis <br/><br/>
Electronic communications 
Roddy Dennis; Coolen John 
 - 4 
 - Delhi  Pearson Education (Singapore) Pvt. Ltd.       1995 
 - ix, 820p.  cm. 
<br/><br/> Appendix A-B, 802-809p. 
<br/><br/><label>ISBN: </label>8129701065 (pbk) 
<br/><br/><label>Standard No.: </label>13692 
<br/><br/><label>Source: </label> 138, 15/03/2005, Dhanraj Book House  Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Communication<br/>Computer Scinece
<br/><br/><label>Dewey Class. No.: </label>D65,4, M7;N5;7-;8