POLKOWSKI,L <br/><br/>
ROUGH SETS IN KNOWLEDGE DISCOVERY1:METHODOLOGY AND APPLICAATIONS 

 - NEW YORK  Physica-Verlag  1998 
 - ix+576p.,24X16Cms. 
<br/><br/><label>ISBN: </label>379081119X 
<br/><br/><label>Dewey Class. No.: </label>517.521 P771