Não informado. (2022). USDA Forest Service Research Note PNW. Pacific Northwest Forest and Range Experiment Station.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. USDA Forest Service Research Note PNW. Portland, Ore: Pacific Northwest Forest and Range Experiment Station, 2022.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. USDA Forest Service Research Note PNW. Pacific Northwest Forest and Range Experiment Station, 2022.
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