TY - BOOK ID - 145243829 TI - Thresholds for protecting Pacific Northwest ecosystems from atmospheric deposition of nitrogen : state of knowledge report AU - Cummings, Tonnie AU - United States. PY - 2014 PB - Fort Collins, Colorado : U.S. Department of the Interior, National Park Service, Natural Resource Stewardship and Science, DB - UniCat KW - National parks and reserves KW - Atmospheric deposition KW - Acidification. KW - Atmospherics. KW - Northwest, Pacific. UR - https://www.unicat.be/uniCat?func=search&query=sysid:145243829 AB - ER -