United States. Forest Service. Northern Region. (1944). Early days in the forest service. U.S.D.A. Forest Service, Northern Region.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited States. Forest Service. Northern Region. Early Days in the Forest Service. Missoula, Mont.: U.S.D.A. Forest Service, Northern Region, 1944.
एमएलए (8वां संस्करण) प्रशस्ति पत्रUnited States. Forest Service. Northern Region. Early Days in the Forest Service. U.S.D.A. Forest Service, Northern Region, 1944.
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