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Thompson, F. G. (1985). Columbinia vasquezi, a new clausiliid land snail from Bolivia. Proceedings of the Biological Society of Washington. 98(4): 768-773.
Thompson, F. G. (1985). Columbinia vasquezi, a new clausiliid land snail from Bolivia. Proceedings of the Biological Society of Washington. 98(4): 768-773.