Understory herb and shrub responses to root trenching, pre-commercial thinning, and canopy closure in Douglas-fir forests of the western Cascades, Oregon. Lindh, B. C. Ph.D. Thesis, Oregon State University, Corvallis, OR, 2003.
Understory herb and shrub responses to root trenching, pre-commercial thinning, and canopy closure in Douglas-fir forests of the western Cascades, Oregon [pdf]Paper  bibtex   

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