@data{10.12072/ncdc.sdzraw.db2943.2023,
title = {Monthly mean value of carbon monoxide at Shangdianzi atmospheric background station, Beijing, 2004-2005},
author = {Zhang Xiaochun and Quan Weijun},
url = {http://www.ncdc.ac.cn/portal/metadata/0596479e-1298-11e6-9b93-5cc5d45ad3ae},
cstr = {11738.11.ncdc.SDZRAW.2020.16},
doi = {10.12072/ncdc.sdzraw.db2943.2023},
journal = {National Cryosphere Desert Data Center},
publisher = {National Cryosphere Desert Data Center(www.ncdc.ac.cn)}
}