McNamara, John E. <br/><br/>
Technical aspects of data communication / 
John E. McNamara. 
 - 2nd. ed. 
 - Bedford, Mass. :  Digital Press,  1982. 
 - 330p. :  ill. ;  23cm. 
<br/><br/><label>ISBN: </label>0932376185 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission system.