Otrosina, W., and G. Ferrell. 1992. Resistance of white fir provenances to the fir engraver (Scolytus ventralis)—Trichosporum symbioticum complex. Page 153 In Douglas C. Allen and L.P. Abrahamson (eds.), Proceedings: North American Forest Insect Work Conference, Denver, Colorado, March 25-28, 1991. United States Department of Agriculture, Forest Service, Pacific Northwest Research Station (Portland, OR), General Technical Report PNW-GTR-294.
Otrosina & Ferrell 1992
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