Advanced office systems/  English. 
Allen N. Smith...(et.al). 
 - Cincinnati:  South-western publishing co.,  1986. 
 - xx, 620p.:  ill.;  24cm. 
<br/><br/><label>ISBN: </label>0538108908 
<br/><br/><label>Dewey Class. No.: </label>681.14:651  / SMI