共 15 条
[4]
Freeman A.M, 1979, BENEFITS ENV IMPROVE
[5]
Griliches Z., 1971, PRICE INDEXES QUALIT
[7]
HAMMACK J, 1974, WATER FOWL WETLANDS
[8]
Intrilligator M. D., 1971, MATH OPTIMIZATION EC
[9]
JAMBERS HT, 1980, TIERRA GRANDE, V11, P20
[10]
KMENTA J, 1971, ELEMENTS ECONOMETRIC