TY - RPRT TI - Effects of impoundments on freshwater mussels (Mollusca: Bivalvia: Unionidae) in the main channel of the Black Warrior and Tombigbee rivers in western Alabama AU - J.D. Williams AU - S.L.H. Fuller AU - R. Grace PY - 1992 UR - https://pubs.usgs.gov/publication/1008507 ID - 1008507 ER -