Progress Report on an Experiment in Thinning Ponderosa Pine–White Fir Pole Stands to Control Mountain Pine Beetle by Charles B. Eaton / U.S. Forest Service (1939)

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Progress Report on an Experiment in Thinning Ponderosa Pine–White Fir Pole Stands to Control Mountain Pine Beetle Charles B. Eaton / U.S. Forest Service (1939)