共 7 条
[3]
KMENTA J, 1971, ELEMENTS ECONOMETRIC
[4]
READSHAW JL, 1982, P AUSTR WORKSHOP DEV
[5]
WESTIGARD P, 1967, OREG AGR EXP STN TEC, V101
[7]
Zalom F. G., 1984, California Agriculture, V38, P17