TY  - RPRT
TI  - USGS Tracks Acid Rain
AU  - John D. Gordon
AU  - Mark A. Nilles
AU  - LeRoy J. Schroder
PY  - 1995
DO  - 10.3133/fs18395
UR  - https://pubs.usgs.gov/publication/fs18395
ID  - fs18395
ER  -