TY  - RPRT
TI  - A 50-year record of NOx and SO2 sources in precipitation in the Northern Rocky Mountains, USA
AU  - David L. Naftz
AU  - Paul F. Schuster
AU  - Craig A. Johnson
PY  - 2011
DO  - 10.1186/1467-4866-12-4
UR  - https://pubs.usgs.gov/publication/70036071
ID  - 70036071
ER  -