TY  - BOOK
AU  - RAY, Subhash C.
TI  - Data envelopment analysis: theory and techniques for economics and operations research 
SN  - 0521802563
U1  - 338.4501 
PY  - 2004///
CY  - Cambridge, UK
PB  - Cambridge University Press
KW  - Data envelopment analysis.---
ER  -