TY - RPRT TI - Heavy metals in aquatic macrophytes drifting in a large river AU - Bruce A. Manny AU - Susan J. Nichols AU - Donald W. Schloesser PY - 1991 DO - 10.1007/978-94-011-3144-5_22 UR - https://pubs.usgs.gov/publication/1000602 ID - 1000602 ER -