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TWO CALDERA-FORMING ERUPTIONS ON UMNAK ISLAND, EASTERN ALEUTIAN ISLANDS
Miller, T. P., and Smith, R. L., 1976, Two caldera-forming eruptions on Umnak Island, eastern Aleutian Islands [abs.]: in Cobb, E. H., (ed.), The United States Geological Survey in Alaska: accomplishments during 1975, U.S. Geological Survey Circular C 0733, p. 45.