1. Entering the Watershed: A New Approach to Save America's River Ecosystems;Doppelt,1993
2. Designing agricultural ecosystems for the humid tropics;Ewel;Annu. Rev. Ecol. Syst.,1986
3. Man, Mind and Land: A Theory of Resource Use;Firey,1960
4. Conditions for the realization of values remote in time;Firey,1963
5. Landscape Ecology;Forman,1986