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1. Genetic Variation and Seed Transfer Guidelines for Ponderosa Pine in Central Oregon. Research Paper PNW-RP-472, July 1994
Genetic Variation and Seed Transfer Guidelines for Ponderosa Pine in Central Oregon. Research Paper PNW-RP-472, July 1994
Sorensen Frank C.
Portland : U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station , 1994. - 24 s.:6 obr., 8 tab.
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