Pojeta, J. Jr.; Runnegar, B. (1976). The paleontology of rostroconch mollusks and the early history of the phylum Mollusca. Professional Paper of the United States Geological Survey. 968: 1-88.
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Pojeta, J. Jr.; Runnegar, B.
1976
The paleontology of rostroconch mollusks and the early history of the phylum Mollusca
Professional Paper of the United States Geological Survey