Kaufmann, A. <br/><br/>
Introduction to the theory of fuzzy subsets, Vol.1   
by A. Kaufmann, tr. by D. L. Swanson. 
 - New York  Academic Press  1975 
 - xvi, 416p, incl bibl. & ind. 
<br/><br/> Vol.1 Fundamental Theoretical Elements 
<br/><br/><label>ISBN: </label>0124023010 
<br/><br/><label>Dewey Class. No.: </label>511.3  / N752