TY  - BOOK
AU  - Purev Byambagiin
AU  - Bakey A
TI  - Parametric and nonparametric analysis of productive  efficiency: (application to wheat  production)
PY  - 2002///
CY  - UB.
KW  - Business Administration
KW  - Ð­Ð´Ð¸Ð¹Ð½ Ð·Ð°ÑÐ°Ð³
ER  -