"Hutchinson, S.E." <br/><br/>
Computers communication and information/ 
S.E. Hutchinson 
 - Boston:  "Irwin,"  1998 
 - 200p. 
<br/><br/><label>ISBN: </label>0-256-25277-7 
<br/><br/><label>Subjects--Index Terms: </label>Communications 
<br/><br/><label>Dewey Class. No.: </label>4