Polkowski, Lech, <br/><br/>
Rough Sets in Knowledge Discovery 2 : 

 -  Physica,  1998. 
 - 620 pages 
<br/><br/><label>ISBN: </label>9783790811209 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business & Economics.
<br/><br/><label>Dewey Class. No.: </label>005.12  / POL