TY  - BOOK
AU  - Ray Subhash C
TI  - Data envelopment analysis:  Theory and techniques for economics and operations research.   
SN  - 0521802563
U1  - X:(B2893), P4 
PY  - 2004///
CY  - Cambridge
PB  - Cambridge University Press        
KW  - Economics irt Operation Research
N1  - Bibliography: P 329-338
ER  -