| Reference | {Deposit:: KOREAN INSTITUTE OF ENERGY AND RESOURCES, THE GEOLOGY OF}{Deposit:: KOREA, 1975.}{Deposit:: YOO, KYUNG SEOK, MANAGING DIRECTOR, DAE HAN GRAPHITE MINING}{Deposit:: COMPANY, INTERVIEW CONDUCTED BY STAFF MEMBERS FROM}{Deposit:: ZELLARS-WILLIAMS, INC., 1983.}{Deposit:: KOREA GRAPHITE MINING COMPANY, PERS. COMMUN., 1983.}{Deposit:: KOREA MINING PROMOTION CORP., PERS. COMMUN., 1983.}{Deposit:: KOREA INSTUTUTE OF ENERGY AND RESOURCES, PERS. COMMUN.,} |