@data{10.12072/casnw.040.2018.db,
title = {1990年宁夏回族自治区1:70万土地覆被数据集},
author = {颜长珍 and 谢家丽},
url = {http://www.ncdc.ac.cn/portal/metadata/823682f8-9477-4b0a-85d8-45f5e5571ecb},
cstr = {11738.11.ncdc.nieer.2020.1434},
doi = {10.12072/casnw.040.2018.db},
journal = {国家冰川冻土沙漠科学数据中心},
publisher = {国家冰川冻土沙漠科学数据中心(www.ncdc.ac.cn)}
}