South African red data book : reptiles and amphibians
1978
McLachlan, G. R. |
Endangered species
Threatened plants of southern Africa
1980
Hall, A. V. |
South African red data book - fishes
1987
Skelton, Paul H. (Paul Harvey) |
Extinct and vanishing mammals of the Western hemisphere with the marine species of all the oceans
1942
Allen, Glover Morrill |
Key forests for threatened birds in Africa
1988
Collar, N. J. |
Stuart, S. N. |
Threatened endemic mammals of the Atlantic forest region of south-east Brazil : a report of the 1986/87 field survey in eastern Bahia and Espírito Santo
1991
Oliver, William L. R. |
Santos, Ilmar B. |
The California condor, 1966-76 : a look at its past and future
1978
Wilbur, Sanford R. |
The current status and welfare of the California condor
1965
Miller, Alden H. |
McMillan, Ian I. |
McMillan, Eben |
Report of the advisory panel on the California condor
1978
Ricklefs, Robert E. |