Ray, Subhash C. <br/><br/>
Data envelopment analysis  theory and techniques for economics and operations research 

 - Cambridge  Cambridge University Press  2004 
 - xii, 353p. Bibl. Index. 
<br/><br/>  
<br/><br/><label>ISBN: </label>0521802563 
<br/><br/><label>Dewey Class. No.: </label>658.4034  / R264.DE