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Western spruce budworm host series
efk_h
An rwl object with 37 tree-level series, standardized in ARSTAN. Dates range from 1776-1987.
rwl
Swetnam, T.W., Lynch, A.M., 1993. Multicentury, Regional-Scale Patterns of Western Spruce Budworm Outbreaks. Ecological Monographs 63, 399–424. https://doi.org/10.2307/2937153