freshwater mussels
Havlik, M.E. and L.L. Marking. 1984. Effects of contaminants on naiad mollusks (Unionidae): a review. Abstract in Bulletin of the American Malacogical Union 3(1):106-107
Havlik, M.E. 1981. The historic and present distribution of the endangered mollusk Lampsilis higginsi (Lea 1857). Bulletin of the American Malacological Union for 1980: 19-22.
Heard, W.H. 1970. Eastern freshwater mollusks. 1. The south Atlantic and Gulf drainages. In: A.H. Clarke (ed.) Rare and endangered molluscs of North America. Malacologia 10:1-56.
Starrett, W.C. 1971. A survey of the mussels (Unionacea) of the Illinois River: A polluted stream. Illinois Natural History Survey Bulletin, 30(5): 263-403.
Ellis, M.M. 1936. Erosion silt as a factor in aquatic environments. Ecology, 17: 29-42.