Seyer, Martin D  <br/><br/>
RS-232 made easy connecting computers, printers, terminals and modem / 
Martin D. Seyer. 
 - 2nd ed. 
 - Englewood Cliffs, N.J.:  Prentice-Hall,  1991. 
 - 436 p. :   ill. ;   24 cm. 
<br/><br/><label>ISBN: </label>0137498705 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer interfaces--Standards--United States.