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Seasonal migratory cycle and related movements of the fresh-water pulmonate snail, Physa integra. The American Midlands Naturalist. 92:275-300.. 1974.
Substratum as a factor in the distribution of pulmonate snails in Douglas Lake, Michigan. Malacologia. 12:379-399.. 1973.
Seasonal migrations and other movements in Douglas Lake pulmonate snails. Malacological Review. 5:11-12.. 1972.