TY  - RPRT
TI  - Relations of biological indicators to nutrient data for lakes and streams in Pennsylvania and West Virginia, 1990-98
AU  - Robin A. Brightbill
AU  - Edward H. Koerkle
PY  - 2003
DO  - 10.3133/wri034033
UR  - https://pubs.usgs.gov/publication/wri034033
ID  - wri034033
ER  -