Fitzgerald, Jerry <br/><br/>
Business data communications   basic concepts,security and design 

 - 4th ed. 
 - New York  John wiley  1993 
 - xxv, 721p. 
<br/><br/> Include index 
<br/><br/><label>Subjects--Index Terms: </label>Computer network data transmission systems 
<br/><br/><label>Dewey Class. No.: </label>004.6  / FIT