TUNGSTEN BY K C LI AND CHUNG YU WANG 1955 BY REINHOLD PUBLISECONOMIC GEOLOGY VOL 38 SEPT-OCT 1943 BY KE-CHIN HSU NO 6 P4DEFENSE MAPPING AGENCY AEROSPACE CENTER 1972 ONC H-12 1:1000CHINAS GEOGRAPHIC FOUNDATIONS BY G B CRESSEY 1934 MCGRAW-HILPEOPLES REPUBLIC OF CHINA ATLAS BY CENTRAL INTELLIGENCE AGEN