Hidden Bibliographic Details
Other title: | Ashland quadrangle, Oregon : land classification and density of standing timber.
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Other uniform titles: | Geological Survey (U.S.). Annual report.
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Other authors / contributors: | Leiberg, John B. (John Bernhard), 1853-1913.
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Notes: | Relief shown by contours and spot heights. "Surveyed in 1886-7." Plate LXXI from the "Twenty-first annual report" of the U.S. Geological survey, Part 5, Forest reserves (1900). Shows ten classes of land cover and six classes of forest density. "Julius Bien & Co. Lith. N.Y."
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