Keravnou, E. T. <br/><br/>
Competent expert systems :  a case study in fault diagnosis / 
E. T. Keravnou & L. Johnson 
 - London :  Kogan Page,  1986 
 - 320 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>185091091X 
<br/><br/><label>LCCN: </label>86-020969 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Expert systems (Computer science)<br/>Automatic checkout equipment