A guide to the birds of Panama.
Princeton: Princeton University Press, 1976. Octavo, colour plates, text illustrations, very good copy in dustwrapper. More
Princeton: Princeton University Press, 1976. Octavo, colour plates, text illustrations, very good copy in dustwrapper. More
Washington: Smithsonian Miscellaneous Collections, Volume 134, No. 9, 1957. Octavo, wrappers, four photographs, text illustrations, signature. More
Washington: Smithsonian Institution Press, 1968. Octavo, text illustrations, dustwrapper. More
Washington: Smithsonian Institution, 1965. Octavo, text illustrations, dustwrapper. More
Washington: Smithsonian Institution, 1972. Octavo, text illustrations, dustwrapper. More