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Poulton, T. P. (1979). Jurassic trigoniid bivalves from Canada and western United States of America. Geological Survey of Canada, Bulletin. 282: 1-78.
Poulton, T. P. (1979). Jurassic trigoniid bivalves from Canada and western United States of America. Geological Survey of Canada, Bulletin. 282: 1-78.