Elahi, Ata <br/><br/>
Data, network & internet communications technology/ 
Ata Elahi; Mehran Elahi 
 - Australia:  Cengage  2006 
 - 570p. 
<br/><br/><label>ISBN: </label>9 788131 506837 
<br/><br/><label>Dewey Class. No.: </label>004.7  / ELA