TY  - RPRT
TI  - Thresholds for protecting Pacific Northwest ecosystems from atmospheric deposition of nitrogen: state of knowledge report
AU  - Tonnie Cummings
AU  - Tamara Blett
AU  - Ellen Porter
AU  - Linda Geiser
AU  - Rick Graw
AU  - Jill McMurray
AU  - Steven S. Perakis
AU  - Regina Rochefort
PY  - 2014
UR  - https://pubs.usgs.gov/publication/70116360
ID  - 70116360
ER  -