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U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture


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https://www.fs.usda.gov/treesearch/search?keywords=%22estimation%22&amp%3Bf%5B0%5D=author_facet%3A%22Crow%2C%20Tom%22&f%5B0%5D=author_facet%3A%22Mckeever%2C%20David%22