| Reference | {Deposit:: ATLAS OF EASTERN EUROPE, CENTRAL INTELLIGENCE AGENCY,}{Deposit:: AUGUST 1990.}{Deposit:: COMMODITIES RESEARCH UNIT LIMITED, THE BASE METAL}{Deposit:: INDUSTRIES OF EASTERN EUROPE, NOV. 1990.}{Geology:: HURLBUT, CORNELIUS S., DAN* MANUAL OF MINERALOGY,}{Geology:: EIGHTEENTH EDITION, 1971.}{Production:: MINERAL FACTS AND PROBLEMS, UNITED STATES DEPARTMENT OF}{Production:: THE INTERIOR, BUREAU OF MINES BULLETIN 675, EDITION 1985.} |