共 26 条
[1]
BENBROOK CM, 1986, J SOIL WATER CONSERV, V41, P285
[2]
BLAIKIE P, 1986, POLITICAL EC SOIL ER
[3]
CARTER VG, 1981, TOPSOIL CIVILIZATION
[4]
*CONS F, 1985, ER SOILS OFF FARM IM
[5]
CRITTENDEN A, 1980, NY TIMES 1026
[6]
CROSSON PR, 1982, RESOURCE ENV EFFECTS
[7]
DRABENSTOTT M, 1987, ECON REV, V72, P28
[8]
ERVIN DE, 1986, J SOIL WATER CONSERV, V41, P77
[9]
LAYCOCK W, 1987, 1987 AM AGR CROSSR C
[10]
Lowe P., 1986, COUNTRYSIDE CONFLICT