Pennak, R.W. (1990). Freshwater in- vertebrates of the United States. Pro- tozoa to Mollusca (3rd ed.). New York: John Wiley and Sons.
Freshwater invertebrates of the United States
Thorpe, J.H. & Covich, A.P. (1991). Ecology and classification of North American freshwater invertebrates. New York: Academic Press.
Ecology and classification of North American freshwater invertebrates
This content is only available via PDF.
Copyright 1995 The National Association of Biology Teachers