Kruse, R. Kruse, R.; Schwecke, E. & Heinsohn, J. <br/><br/>
Uncertainity and Vagueness in Knowledge Based Systems 

 - 1st Ed. 
 - New York  Springer-Verlag Berlin  1991 
 - xi, 491 p.  20 cm. 
<br/><br/><br/>Text in English 
<br/><br/><label>ISBN: </label>3540541659 
<br/><br/><label>Dewey Class. No.: </label>1.535  / KRU