TY  - RPRT
TI  - Determination of benthic-invertebrate indices and water-quality trends of selected streams in Chester County, Pennsylvania, 1969-80
AU  - C.R. Moore
PY  - 1987
DO  - 10.3133/wri854177
UR  - https://pubs.usgs.gov/publication/wri854177
ID  - wri854177
ER  -