. Bulletin - United States National Museum. Science. Nesting Site and nest of sanfords Ptarmigan Tanaga Island, Alaska, June ;, 1911. Photographs by Hollo II. Heck. Referred to on page 22. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S

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. Bulletin - United States National Museum. Science. Nesting Site and nest of sanfords Ptarmigan Tanaga Island, Alaska, June ;, 1911. Photographs by Hollo II. Heck. Referred to on page 22. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.

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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience