Joint Committee on Forest Conservation. (1937). Forest practice handbook: Presenting the rules of forest practice for the Douglas fir region (Rev.). Joint Committee on Forest Conservation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रJoint Committee on Forest Conservation. Forest Practice Handbook: Presenting the Rules of Forest Practice for the Douglas Fir Region. Rev. Seattle: Joint Committee on Forest Conservation, 1937.
एमएलए (8वां संस्करण) प्रशस्ति पत्रJoint Committee on Forest Conservation. Forest Practice Handbook: Presenting the Rules of Forest Practice for the Douglas Fir Region. Rev. Joint Committee on Forest Conservation, 1937.
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