United States. Forest Service. North Pacific Region. Public Relations Office. (1932). What is forestry?: An outline for classes in economics, geography and nature study in high schools of Washington.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited States. Forest Service. North Pacific Region. Public Relations Office. What Is Forestry?: An Outline for Classes in Economics, Geography and Nature Study in High Schools of Washington. Portland, 1932.
एमएलए (8वां संस्करण) प्रशस्ति पत्रUnited States. Forest Service. North Pacific Region. Public Relations Office. What Is Forestry?: An Outline for Classes in Economics, Geography and Nature Study in High Schools of Washington. 1932.
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