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1963
Snyder, George L., and George D. Fraser. Pillowed Lavas, I: Intrusive Layered Lava Pods and Pillowed Lavas, Unalaska Island, Alaska In U. S. Geological Survey Professional Paper. Vol. 454-B. Department of the Interior, 1963.
Snyder, George L., and George D. Fraser. Pillowed Lavas, II: A Review of Selected Recent Literature In U. S. Geological Survey Professional Paper. Vol. 454-C. Department of the Interior, 1963.