I. GEOLOGY AND TOPOGRAPHY OF THE CORUNDUM DISTRTOT. The corundum is found in Ping Shan Hsien (平山縣) which is located in the south-western part of Chihli. It connects with Chin Hsing
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PROCEEDINGS OF THE NINTH GENERAL MEETING OF THE GEOLOGICAL SOCIETY OF CHINA HELD IN PEKING APRIL .1925. CORUNDUM OF PING SHAN DISTRICT, W. CHIHLI.[J]. Acta Geologica Sinica(),4(Z1):193-196
