TY  - RPRT
TI  - Correlations between stream sulphate and regional SO2 emissions
AU  - R. A. Smith
AU  - R. B. Alexander
PY  - 1986
DO  - 10.1038/322722a0
UR  - https://pubs.usgs.gov/publication/70015541
ID  - 70015541
ER  -