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Richards, H. G. (1939). Land mollusks from Corn Island, Nicaragua. Proceedings of the American Philosophical Society. 81(1): 29-36, 4 text figs (May 31, 1939).
Richards, H. G. (1939). Land mollusks from Corn Island, Nicaragua. Proceedings of the American Philosophical Society. 81(1): 29-36, 4 text figs (May 31, 1939).
