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Quaestiones entomologicae - University of Alberta. Dept. of Entomology. (Dept. of Entomology, University of Alberta, 1976)

Quaestiones entomologicae - University of Alberta. Dept. of Entomology. (Dept. of Entomology, University of Alberta, 1977)

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Red rot of ponderosa pine - Andrews, Stuart R., 1910 - (U.S. Dept. of Agriculture, Forest Service, 1955)

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Reduction in growth of pole-sized Ponderosa pine related to a Pandora moth outbreak in central Oregon - Pacific Northwest Research Station (Portland, Or.) (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1998)

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Regeneration in mixed conifer partial cuttings in the Blue Mountains of Oregon and Washington - Pacific Northwest Forest; Range Experiment Station (Portland, Or.) (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1983)

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Relationship of needle surface area to needle volume in ponderosa pine and lodgepole pine - Pacific Northwest Forest; Range Experiment Station (Portland, Or.) (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1970)

Relationship of shoot-root ration to survival and growth of outplanted Douglas-fir and ponderosa pine seedlings - Beebe, T. (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1976)

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Relative resistance of various conifers to injection with creosote - Teesdale, Clyde Harry. (U.S. Dept. of Agriculture, 1914)

Release of a thinned budworm-infested Douglas-fir/ponderosa pine stand - Intermountain Research Station (Ogden, Utah) (U.S. Dept. of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station, 1985)

Repertorium specierum novarum regni vegetabilis (Selbstverlag des Herausgebers, 1910)

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