TY - RPRT TI - Spatial and temporal variation in sources of atmospheric nitrogen deposition in the Rocky Mountains using nitrogen isotopes AU - Leora Nanus AU - Donald H. Campbell AU - Christopher M.B. Lehmann AU - M. Alisa Mast PY - 2018 DO - 10.1016/j.atmosenv.2017.12.023 UR - https://pubs.usgs.gov/publication/70196104 ID - 70196104 ER -