Conkin, J. E.; Conkin, B. M. (1964). Devonian Foraminifera: Part 1, The Louisiana Limestone of Missouri and Illinois. Bulletins of American Paleontology. 47: 53-105.
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Conkin, J. E.; Conkin, B. M.
1964
Devonian Foraminifera: Part 1, The Louisiana Limestone of Missouri and Illinois