Paperback in good condition. Rubbed/soiled covers. Shelf wear. This Preliminary Smithsonian Manual is designed to facilitate field identification of birds in the region, summarize our knowledge of the seasonal, geographic and ecological distribution of birds in the region and encourage collection of data concerning the reproduction, food habits, and other aspects of the natural history of birds of the region. Includes a B&W elevation map showing mountain areas and principal rivers, and one map showing forest zone and permanent ice or snow areas.