Endangered Birds of the World. The ICBP Bird Red Data Book.
Washington DC: Smithsonian Institution Press, 1981. Octavo, unpaginated, softcover. More
Washington DC: Smithsonian Institution Press, 1981. Octavo, unpaginated, softcover. More
Washington, DC: United States Department of the Interior, 1970. Octavo, wrappers, text illustrations. U.S. Fish and Wildlife Service Bureau of Commercial Fisheries, Special Scientific Report- Fisheries No. 586. More