Fitzgerald, Jerry <br/><br/>
Business data communications/ 2ed  Basic concept , security and design 

 - 2nd ed. 
 - New York  John Wiley  1984 
 - xix,656p. 
<br/><br/><label>Subjects--Index Terms: </label>Data transmission systems    computer net works   Office practice auto mation 
<br/><br/><label>Dewey Class. No.: </label>004.6  / FIT