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Cooper, G. A. (1959). Genera of Tertiary and recent rhynchonelloid brachiopods. Smithsonian Miscellaneous Collections. 139(5):1–90, pl. 1–22.
Cooper, G. A. (1959). Genera of Tertiary and recent rhynchonelloid brachiopods. Smithsonian Miscellaneous Collections. 139(5):1–90, pl. 1–22.