Não informado. (2022). USDA Forest Service Research Note NE. Northeastern Forest Experiment Station.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. USDA Forest Service Research Note NE. Upper Darby, Pa: Northeastern Forest Experiment Station, 2022.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. USDA Forest Service Research Note NE. Northeastern Forest Experiment Station, 2022.
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