South African red data book- birds.
South Africa, South African National Scientific Programmes, 1984. Quarto, maps, softcover, slight damamge. More
South Africa, South African National Scientific Programmes, 1984. Quarto, maps, softcover, slight damamge. More
Bloemfontein: Nasionale Museum, 1981. Octavo, paperback, illustrations. Memoirs van die Nasionale Museum Volume 16. More
New York: American Museum of Natural History, 1970. Quarto, wrappers, colour plates, photographs, maps, sonograms. Bulletin of the American Museum of Natural History, volume 143, article 1. More
New York: American Museum of Natural History, 1972. Quarto, wrappers, photographs. Bulletin of the American Museum of Natural History, volume 149, article 3. More