共 71 条
[32]
GOBSTER PH, 1989, J ENVIRON MANAGE, V29, P47
[33]
GREENE W, 1993, EC ANAL
[34]
GREENE WH, 1998, LIMDEP VERSION 7 0 U
[35]
Gujarati D. N., 1995, Basic Econometrics, V3rd ed
[38]
Kennedy GA, 1996, AM J AGR ECON, V78, P1419
[39]
LONG ME, 1996, NATL GEOGR, V190, P80
[40]
LUTZ D, 1998, COMMUNICATION JAN