Natural language understanding /  
James Allen 
 - 2a ed. 
 - EEUU :  The Benjamín, Cummings Publishing Company,  1995 
 - 654 p. :    654 p. ; fig. ; gráf. ;    24 cm. 
<br/><br/><label>ISBN: </label>80533340 
<br/><br/><label>Subjects--Index Terms: </label><br/>LENGUAJE 
<br/><br/><label>LC Class. No.: </label> / A 48 
<br/><br/><label>Universal Decimal Class. No.: </label>004.43