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Geologic map of the Makushin volcanic field, Unalaska Island, Alaska
McConnell, V. S., Beget, J. E., Roach, A. L., Bean, K. W., and Nye, C. J., 1998, Geologic map of the Makushin volcanic field, Unalaska Island, Alaska: Alaska Division of Geological & Geophysical Surveys Report of Investigations RI 97-20, unpaged, 2 sheets, scale 1:63,360. website with links to sheets in MrSID format