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3. New species of fossils from the Pennsylvanian and Permian rocks of Kansas and Oklahoma;Beede;India Univ. Stud.,1916
4. Leonardian and Guadalupian (Permian) conodont biostratigraphy in western and southwestern United States;Behnken;J. Paleontol.,1975
5. Conodont biostratigraphy of the Permian Meade Peake Phosphatic Shale Member, Phosphoria Formation, southeastern Idaho;Behnken;Univ. Wyoming Contrib. Geol.,1986