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1995
Tchikaya, Ferdinand |
IUCN
Elephants in northern Sumatra
1985
Blouch, Raleigh |
Simbolon, Kuppin |
Survey of primates of western Nigeria : information compiled for the International Union for Conservation of Nature and Natural Resources "Survey of African primates"
1968
Happold, D. C. D. |
An advisory opinion on the structure and operational relationships of IUCN's social and economic programs
1997
Christoffersen, Leif E. |
