1. Agee, J. K., and D. R. Johnson. 1988a. A direction for ecosystem management. Pages 226–232in J. K. Agee and D. R. Johnson (eds.), Ecosystem management for parks and wilderness. University of Washington Press, Seattle.
2. Agee, J. K., and D. R. Johnson (eds.). 1988b. Ecosystem management for parks and wilderness. University of Washington Press, Seattle, 234 pp.
3. Allen, C., J. Lissoway, and K. Yarborough. 1990. Landscape ecology—a concept for protecting park resources.Park Science 10(1):7–8.
4. NPS-CPSU Technical Report;J. P. Ambrose,1987
5. Boshe, J. 1986. Wildlife and law enforcement in Africa.Swara 9:8–10.