GEOLOGICAL CHARACTERISTICS OF THE "LU-HSI" (WESTERN SHANTUNG) COAL FIELDS by Chung Shih-hsing -- THE HO-LAN-SHAN COAL-BEARING DISTRICT by Ting P'ei-min -- STRUCTURAL CHARACTERISTICS OF THE UPPER PERMIAN "TO-LING" COAL-BEARING SERIES IN HUNAN PROVINCE by Wang Chai-hsia.
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