3Leopold A. A-sand country almanacand sketches here and there with introduction by finch R. Oxford:Oxford UniversityPress,1987.224-235.
4Beatley T. Paternalism and land use planning: ethical bases and practicalapplications. Bowling Green State University,1985.40-55.
5Beatley T. Ethical land use. Jihns Hopkins University Press,1994.119-137.
6Taylor. Respect for nature:a theory of environmental ethics. New Jersey: PrincetonUniversity Press,1986.84.
7Pier C, et al. Word bank discussion papers No.315: land quality indicators. TheWorld Bank, Washington D.C,U.S.A,1995.55; The world bank,LQI News. Volume,No.1,The WorldBank,Washington D.C,U.S.A,1996.1-2.
8[美]利奥波德.侯文蕙,译..沙乡年鉴[M]..长春:吉林人民出版社,,1997..285..
9Michael S. and Brian S. Keynote: Land Care in Australia. In D. E. Stott, R. H. Mohtar and G. C. Steihhards (eds) Sustaining the Global Farm, West Lafayette, 2001, pp 160-164.