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By: Parks, Catherine A. - Hoffman, James T. - Pacific Northwest Research Station (Portland, Or.)Edition:Publication info: [Portland, Or. (319 S.W. Pine St., Portland 97208)], U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, [1991]Volume: no.506Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects:BHL Collections: