TY  - RPRT
TI  - Dry deposition of ammonia, nitric acid, ammonium, and nitrate to alpine tundra at Niwot Ridge, Colorado
AU  - G. Rattray
AU  - H. Sievering
PY  - 2001
DO  - 10.1016/s1352-2310(00)00276-4
UR  - https://pubs.usgs.gov/publication/70023726
ID  - 70023726
ER  -