Schiff, C.J., Kaufman, D.S., Wallace, K.L., and Ketterer, M.E., 2010, An improved proximal tephrochronology of Redoubt Volcano, Alaska: Journal of Volcanology and Geothermal Research, v. 193, no. 3/4, p. 203-214, doi: 10.1016/j.jvolgeores.2010.03.015 .
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