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Bennison, G. M. (1954). A new species of Carbonicola from near the base of the Namurian in Ayrshire. Geological Magazine. 91(1): 32-44.
Bennison, G. M. (1954). A new species of Carbonicola from near the base of the Namurian in Ayrshire. Geological Magazine. 91(1): 32-44.