Geological Survey (U.S.), North Carolina Geological and Economic Survey, Stephenson, L. W., & Rathbun, M. J. (1923). The Cretaceous formations of North Carolina. Edwards & Broughton Printing Company.
Chicago-referens (17:e uppl.)Geological Survey (U.S.), North Carolina Geological and Economic Survey, Lloyd William Stephenson, och Mary J. Rathbun. The Cretaceous Formations of North Carolina. Raleigh [N.C.]: Edwards & Broughton Printing Company, 1923.
MLA-referens (8:e uppl.)Geological Survey (U.S.), et al. The Cretaceous Formations of North Carolina. Edwards & Broughton Printing Company, 1923.
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