The road to extinction : problems of categorizing the status of taxa threatened with extinction : proceedings of a symposium held by the Species Survival Commission Madrid, 7 and 9 November 1984 /
Fitter, Richard Sidney Richmond.
Fitter, Maisie.
International Union for Conservation of Nature and Natural Resources.
United Nations Environment Programme.
Gland ; Cambridge : International Union for Conservation of Nature and Natural Resources,
1987.
Prepared in collaboration with the United Nations Environment Programme.
Endangered species.
Rare animals.