TY  - RPRT
TI  - Evidence for acid-precipitation-induced trends in stream chemistry at hydrologic bench-mark stations
AU  - Richard A. Smith
AU  - Richard B. Alexander
PY  - 1983
DO  - 10.3133/cir910
UR  - https://pubs.usgs.gov/publication/cir910
ID  - cir910
ER  -