Curtis, Robert O. True fir-hemlock spacing trials : design and first results / Robert O. Curtis, Gary W. Clendenen, Jan A. Henderson. -- Portland : USDA Forest Service, 2000. -- 35 s. : obr., tab. ; 28 cm. -- (General Technical Report ; PNW-GTR-492). -- (brož.) : .00

I. Clendenen, Gary W.
II. Henderson, Jan A.

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