Não informado. (2022). USDA Forest Service Research Paper RM. Rocky Mountain Forest and Range Experiment Station.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. USDA Forest Service Research Paper RM. Fort Collins, Colo: Rocky Mountain Forest and Range Experiment Station, 2022.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. USDA Forest Service Research Paper RM. Rocky Mountain Forest and Range Experiment Station, 2022.
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