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1. Historical patterns of western spruce budworm and Douglas-fir tussock moth outbreaks in the northern Blue Mountains, Oregon, since A.D. 1700
Historical patterns of western spruce budworm and Douglas-fir tussock moth outbreaks in the northern Blue Mountains, Oregon, since A.D. 1700
Swetnam Thomas W.
Wickman Boyd E.
Paul H. Gene
Portland : USDA Forest Service , 1995. - 27 s. : 7 obr., 4 tab., 28 cm
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