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Goodrich, C. & van der Schalie, H. (1937). Mollusca of Peten and North Alta Vera Paz, Guatemala. Miscellaneous Publications, Museum of Zoology, University of Michigan. 40: 1-83.
Goodrich, C. & van der Schalie, H. (1937). Mollusca of Peten and North Alta Vera Paz, Guatemala. Miscellaneous Publications, Museum of Zoology, University of Michigan. 40: 1-83.
