@Article{acp-16-11465-2016,
AUTHOR = {Yao, X. and Zhang, L.},
TITLE = {Trends in atmospheric ammonia at urban, rural, and remote sites across North
America},
JOURNAL = {Atmospheric Chemistry and Physics},
VOLUME = {16},
YEAR = {2016},
NUMBER = {17},
PAGES = {11465--11475},
URL = {https://acp.copernicus.org/articles/16/11465/2016/},
DOI = {10.5194/acp-16-11465-2016}
}