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2. First-year performance of 1-0 containerized Douglas-fir seedlings on droughty sites in southwestern Oregon;Hobbs;For. Res. Lab., Oreg. State Univ., Corvallis. Res. Pap.,1980
3. D.L. Spittlehouse, Determination of the year-to-year variation in growing season water use of a Douglas-fir stand, in: B.A. Hutchinson, B.B. Hicks (Eds.), The Forest-Atmosphere Interaction, 1985, p. 235.
4. Geographic Variation in Seedling Douglas-Fir (Pseudotsuga Menziesii) from the Western Siskiyou Mountains of Oregon