TY - RPRT TI - Organochlorine and trace element contamination in wintering and migrating diving ducks in the southern Great Lakes, USA, since the zebra mussel invasion AU - Christine M. Custer AU - T. W. Custer PY - 2000 DO - 10.1002/etc.5620191129 UR - https://pubs.usgs.gov/publication/1003539 ID - 1003539 ER -