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7 宋/西夏时期无定河流域城镇分布图
注:行政边界参照文献[35]北宋政和元年永兴军路绘制。
Fig. 7 Towns distribution of Wuding River Basin in Song-Xixia period