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MacNeil, F. S. (1957). Cenozoic megafossils of northern Alaska. United States Geological Survey Professional Paper. 294-C: 99–126, pls. 11–17.
MacNeil, F. S. (1957). Cenozoic megafossils of northern Alaska. United States Geological Survey Professional Paper. 294-C: 99–126, pls. 11–17.