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Harrison, A. D. (1984). Redescription of Pyrgophorus parvulus (Gastropoda: Hydrobiidae) from St. Vincent, St. Lucia, and Grenada, West Indies. Proceedings of the Academy of Natural Sciences of Philadelphia. 136: 145-151.
Harrison, A. D. (1984). Redescription of Pyrgophorus parvulus (Gastropoda: Hydrobiidae) from St. Vincent, St. Lucia, and Grenada, West Indies. Proceedings of the Academy of Natural Sciences of Philadelphia. 136: 145-151.
