Twenty Years of Commercial Crop Tending in Immature Douglas-Fir

Author： Tinney William A.   Quam A. N.   O'Donnell A. R.  

Publisher： Society of American Foresters

ISSN： 0022-1201

Source： Journal of Forestry, Vol.59, Iss.10, 1961-10, pp. : 731-733

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