Gibson, T.G., 1983. Key foraminifera from upper Oligocene to lower Pleistocene strata of the central Atlantic coastal plain. Smith. Contrib. Paleobiol., 53: 354–453.
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Gibson, T.G., 1983. Key foraminifera from upper Oligocene to lower Pleistocene strata of the central Atlantic coastal plain. Smith. Contrib. Paleobiol., 53: 354–453