TY  - RPRT
TI  - Nutrient Concentrations and Their Relations to the Biotic Integrity of Nonwadeable Rivers in Wisconsin
AU  - Dale M. Robertson
AU  - Brian M. Weigel
AU  - David J. Graczyk
PY  - 2008
DO  - 10.3133/pp1754
UR  - https://pubs.usgs.gov/publication/pp1754
ID  - pp1754
ER  -