Alexander, R. R. (1983). Seed: seedling ratios of Engelmann spruce after clearcutting in the central Rocky Mountains. [Fort Collins, Colo.]: USDA Forest Service, Rocky Mountain Forest and Range Experiment Station.MLA Citation
Alexander, Robert R. Seed: Seedling Ratios of Engelmann Spruce After Clearcutting In the Central Rocky Mountains. [Fort Collins, Colo.]: USDA Forest Service, Rocky Mountain Forest and Range Experiment Station, 1983.
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