Resources Science, Volume. 42, Issue 6, 1135(2020)
Fig. 2. Trend of average population density in built-up areas, 2007-2016
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Jie WANG, Jiliang ZHANG.
Received: Aug. 23, 2019
Accepted: --
Published Online: Apr. 15, 2021
The Author Email: ZHANG Jiliang (zhangjlgs@163.com)