300 BC-1900 AD无定河流域城镇时空格局演变
佟彪,党安荣,许剑

A historical study on the patterns of spatio-temporal evolution of towns in the Wuding River Basin
TONG Biao,DANG Anrong,XU Jian
图9 元时期无定河流域城镇分布图
注:行政边界参照文献[35]元至顺元年陕西行省绘制。
Fig. 9 Towns distribution of Wuding River Basin in Yuan period