Não informado. (2022). USDA Forest Service Resource Bulletin NC. North Central Forest Experiment Station.
Čikaški stil citiranja (17. izdanje)Não informado. USDA Forest Service Resource Bulletin NC. Saint Paul, Minn: North Central Forest Experiment Station, 2022.
MLA način citiranja (8. izdanje)Não informado. USDA Forest Service Resource Bulletin NC. North Central Forest Experiment Station, 2022.
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