Brewster-Wingard, G. L. (1993). A detailed taxonomy of Upper Cretaceous and Lower Tertiary Crassatellidae in the eastern United States: An example of the nature of extinction at the boundary. U.S. G.P.O..
Chicago Style (17th ed.) CitationBrewster-Wingard, G. Lynn. A Detailed Taxonomy of Upper Cretaceous and Lower Tertiary Crassatellidae in the Eastern United States: An Example of the Nature of Extinction at the Boundary. Washington: U.S. G.P.O., 1993.
MLA (9th ed.) CitationBrewster-Wingard, G. Lynn. A Detailed Taxonomy of Upper Cretaceous and Lower Tertiary Crassatellidae in the Eastern United States: An Example of the Nature of Extinction at the Boundary. U.S. G.P.O., 1993.
Warning: These citations may not always be 100% accurate.