The physiographic features in the Ping Liang (平涼) area are composed of two parts, the mountain on the south and the loess plateau spreading northward to a great extent.
The physiographic features in the Ping Liang (平涼) area are composed of two parts, the mountain on the south and the loess plateau spreading northward to a great extent.
袁復礼.1925. THE ORDOVIOIAN GRAPTOLITE BEDS OF PING LIANG, E. KANSU[J]. ACTA GEOLOGICA SINICA(English edition),4(1):19~20
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