Heiling Graphite Deposit

VEI CHOW, J., 1946; MINERAL RESOURCES OF CHINA; ECONOMICGEOLOGY, VOL. 41, NO. 4, P. 399-474.U.S.B.M., 1948; FOREIGN MINERALS SURVEY: MINERAL RESOURCESOF CHINA - US DEPT. INT. WASHINGTON D.C., 1948.AHNERT, E.E., 1929, MINERAL RESOURCES OF NORTH MANCHURIA,MEMOIRS OF THE GEOLOGIC SURVEY OF CHINA, SERIES A, NO. 7,DECEMBER 1929, PEIPING.ZHAOYANG, H. AND YANTANG, Y., 1984: DEVELOPMENT AND UTIL-ISATION OF INDUSTRIAL MINERALS IN CHINA; 6'TH INDUSTRIALMINERALS INTERNATIONAL CONGRESS, 1984, INDUST. MIN. SPEC.ISS.