Mixon, R.B., Powars, D.S., Ward, L.W. and Andrews, G.W. (1989) Lithostratigraphy and molluscan and diatom biostratigraphy of the Haynesville cores - outer coastal plain of Virginia Geology and Paleontology of the Haynesville Cores - Northeastern Virginia Coastal Plain. U.S. Geological Survey Professional Paper 1489-A.
