Não informado. (1972). General Technical Report RM. Rocky Mountain Forest and Range Experiment Station.
Chicago-Zitierstil (17. Ausg.)Não informado. General Technical Report RM. Fort Collins, Colo: Rocky Mountain Forest and Range Experiment Station, 1972.
MLA-Zitierstil (8. Ausg.)Não informado. General Technical Report RM. Rocky Mountain Forest and Range Experiment Station, 1972.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.