References: Anderson, I. 1987. Epidemic Of Bird Deformities Sweeps Us. New

References:
Anderson, I. 1987. Epidemic of bird deformities sweeps US. New Scientist: 3 Sept.
Adressen. 1989 in McNelly 1990
Ashton, P. 1988. Conservation of Biological diversity in Botanical gardens. Pp. 269-278 In E.Wilson and F. Peter (Ed), Biodiversity. National Academy Press, Washington, DC. 521 pp.
Balodis, M. 1995. 'Reintroduction of beavers in Latvia: Dynamics and results.' Paper presented at the 2nd European Congress of Mammalogy. 27th March-1st April 1995. Southampton University, England.
Clutton-Brock. 1991. Canadian beaver, Castor Canadensis. In: The Handbook of British mammals, ed. by G.B. Corbet and S. Hanus, 572. Oxford, Blackwell scientific Publication.
Conway, W. 1988. Can technology aid species preservation? Pp.263-268. In: E. Wilson and F. Peter (eds) Biodiversity. Nat. Acad. Press, Washington, DC. 251pp.

Elliot, G., Dennis, R., Love, J., Pienkowski, M. and Broad, R. 1991. A future for the White-tailed Eagle in Britain. RSPB Conservation Review, 5:41-46.
English Nature.1994. Species Recovery Programs Newsletter Issue 6. Peterborough, English Nature.
Evans, I.M., Love, J.A., Galbaith, C.A., and Pienkowski, M.W., 1994. Population and Range Restoration of Threatened Raptors in the United Kingdom. Raptor Conservation Today. 447-457.
Ferry, B. (1994): Species Recovery Program- stinking Hawk beard Crepis foetida Final report- November 1994. Peterborough, English Nature. (Project No.F 72-21-23).
Fosberg, F. 1988. Artificial diversity. Environmental Conservation. 15(2):74.
Graham, N. and White, W. 1988. The El Niño Cycle: A Natural oscillator of the Pacific Ocean Atmosphere System. Sci.: 240: 1293-1302.
Halley, D. 1995. The Proposal Reintroduction of the Beaver to Britain- in reply. Reintroduction News, 10: 17-18.
Jungius, H. 1985. Prospects for reintroduction: symp. Zool. Soc. London. No. 54; 47-55.
Kenward, R.E., 1979. Winter Predation by goshawks in lowland Britain. Bird study, 72; 64-73.
Lever, C. 1980. No beavers for Britain. New Scientist, 80; 812; 814.
Lever, C. 1984. The Proposed Reintroduction of the beaver to Britain. Reintroduction News, 9; 14-15.
Mac Donald, D.W., Brown, E. and Tattersall, F. H. 1995. Reintroducing the Beaver to Britain: nostalgic meddling or restoring biodiversity? Mammal Review. 25, in press.
Mc Neely, J. A., Miller, K.R., Reid, W.V., Mittermeir, R.A. and T.B. Werner. 1990. Conserving the world's biological diversity. IUCN, Gland, Switzerland; WRI, CI, WWF-US and the World Bank, Washington, D. C., 193 pp.
Mooney, H. (ed) 1985. Ecological consequences of biological invasions. Sprigner Verlag, New York.
Payton, I.J., Fenner, M., Lee, W.G. 2002. Keystone Species: the concept and its relevance for conservation management in New Zealand. Science for Conservation. 203-29p.
Primm, S.