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收藏Mendeley Data2024-03-27 更新2024-06-27 收录
下载链接：
http://www.icpsr.umich.edu/icpsrweb/DSDR/studies/31681
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资源简介：
All the counties in the 12 Great Plains states of the United States (Colorado, Iowa, Kansas, Minnesota, Montana, Nebraska, New Mexico, North Dakota, Oklahoma, South Dakota, Texas, and Wyoming). Smallest Geographic Unit: county
创建时间：
2023-06-28
