Zimmerman, Steven M. <br/><br/>
Understanding and using microcomputers / 
by Steven M. Zimmerman and Leo M. Conrad. 
 - 3rd ed. 
 - St.Paul, Ind. :  West Publ. Comp.,  1991. 
 - xxv, 435 p. : ill. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0314761721 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business--Data processing.<br/>Microcomputers--Programming.