A review of the North American freshwater snail genus Pyrgulopsis (Hydrobiidae) /
Robert Hershler

APA Citation

Hershler, R. (1994). A review of the North American freshwater snail genus Pyrgulopsis (Hydrobiidae). Washington, D.C.: Smithsonian Institution Press.

MLA Citation

Hershler, Robert. A Review of the North American Freshwater Snail Genus Pyrgulopsis (Hydrobiidae). Washington, D.C.: Smithsonian Institution Press, 1994.

Warning: These citations may not always be complete (especially for serials).