1. Conservation of imperiled species and reauthorization of the Endangered Species Act of 1973;Angermeier;Fisheries,1994
2. Discordant Harmonies: A New Ecology for the 21st Century;Botkin,1990
3. Managing Environmental Issues: A Case Book;Buchholz,1991
4. Managing planet earth;Clark;Sci. Amer.,1989
5. The Evolution of National Wildlife Law;Environmental,1977