Held,Gilbert <br/><br/>
IBM PC AT user's reference manual 

 - New Jersey  Hayden Book Company  1985 
 - 443p. 
<br/><br/><label>ISBN: </label>0810463946 
<br/><br/><label>Subjects--Index Terms: </label>IBM - personal computer  IBM  personal computer - AT 
<br/><br/><label>Dewey Class. No.: </label>004.16 IBM  / HEL