Natural Language Based computer System 

 - London:  Hanser,   1980. 
 - 354p.;  20cm 
<br/><br/><label>ISBN: </label>0333295277 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer science<br/>Knowledge
<br/><br/><label>Dewey Class. No.: </label>001.51  / NAT