TY - RPRT TI - Changing abundance of Hexagenia mayfly nymphs in western Lake Erie of the Laurentian Great Lakes: Impediments to assessment of lake recovery? AU - D. W. Schloesser AU - T.F. Nalepa PY - 2001 DO - 10.1002/1522-2632(200101)86:1<87::aid-iroh87>3.0.co;2-5 UR - https://pubs.usgs.gov/publication/70023627 ID - 70023627 ER -