TY  - RPRT
TI  - Influence of natural factors on the quality of midwestern streams and rivers
AU  - Stephen D. Porter
AU  - Mitchell A. Harris
AU  - Stephen J. Kalkhoff
PY  - 2001
DO  - 10.3133/wri004288
UR  - https://pubs.usgs.gov/publication/wri004288
ID  - wri004288
ER  -