Wyoming-South Dakota, Newcastle quadrangle : land classification and density of standing timber / U.S. Geological Survey ; E.M. Douglas, geographer in charge ; triangulation by Frank Tweedy and R.H. Chapman ; topography by W.H. Herron ; Henry Gannett, geoGeological Survey (U.S.)[1901]"Engraved Apr. 1901 by Julius Bien & Co.""SurveyedPlate CXLI from the "Twenty-first annual report" of the U.S. Geological Survey, Part 5, Forest reserves (1900).Relief shown by contours and spot heights.Shows four classes of land cover.cartographic