Complete set in five volumes. Fine hardcovers in dust jackets. Parts 1-4 published by the Smithsonian Institution Press, 1965-1984. Part 5: Gazetteer and Bibliography, published by Buteo Books, 2009. The definitive study of the distribution and variation of the birds of Panamá, the final two volumes completed by Roger E. PASQUIER, Storrs L. OLSON, and Deborah C. SIEGEL.