共 19 条
[1]
AGGER P, 1991, CHANGES LAND USE BIO, V108
[3]
ANDERSEN E, 1998, MILJOVENLIGE JORDBRU
[4]
BRANDT J, 1996, 2 ROSK U
[5]
Burel F, 1996, CRIT REV PLANT SCI, V15, P169, DOI 10.1080/713608130
[7]
CONRAD J, 1987, LAND USE POLICY JUL, P229
[9]
*EUR, 1996, FARM STRUCT 1993 SUR
[10]
GREEN B, 1986, LAND USE POLICY JUL, P193