Birds to watch: the ICBP world check-list of threatened birds.
Girton: International Council for Bird Preservation, 1988. Octavo, paperback. International Council for Bird Preservation Technical Publication No. 8. More
Girton: International Council for Bird Preservation, 1988. Octavo, paperback. International Council for Bird Preservation Technical Publication No. 8. More
Cambridge: Cambridge University Press, 1987. Quarto, colour photographs, very good dustwrapper. More
Washington DC: Smithsonian Institution Press, 1981. Octavo, unpaginated, softcover. More
Canberra: Department of Agriculture, Fisheries and Forestry, 2007. Small quarto, colour photographs, maps, softcover. More