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Imlay, R. W. (1961). Late Jurassic Ammonites From the Western Sierra Nevada, California. United States Geological Survey Professional Paper. 374-D: 1-30, pls 1-6.
Imlay, R. W. (1961). Late Jurassic Ammonites From the Western Sierra Nevada, California. United States Geological Survey Professional Paper. 374-D: 1-30, pls 1-6.
