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Levels-of-growing-stock cooperative study on Douglas-fir
Description of study and existing study areas
Levels of growing stock cooperative study on Douglas-fir
Cooperative levels of growing stock study in Douglas-fir
by Richard L. Williamson and George R. Staebler.
Cover title: Cooperative levels-of-growing stock study in Douglas-fir.
USDA Forest Service research paper PNW ; 111