00431nam a2200121Ia 4500008004100000082002500041100002200066245007900088260003500167300002200202440004100224490004400265260122b        |||||||| |||| 00| 0 eng d  a338.015195bSe476.EA  aSengupta, Jati K.  aEfficiency analysis by production frontiers, the nonparametric approachb/  aBoston:bAcademic Press,c1989  aix, 246 p. Index.  aMathematical and Statistical Methods  aTheory and Decision Library vSeries B