| Reference | {Deposit:: MINING MAGAZINE. LUXEMBOURG. JANUARY 1979, P. 57.}{Deposit:: KEYES, W. F., R. V. SONDERMAYER, AND J. B. HUVOS. LUXEM-}{Deposit:: BOURG. IN MINERAL INDUSTRIES OF WESTERN EUROPE, U. S.}{Deposit:: BUREAU OF MINES, WASHINGTON D. C., 1977, P. 32-33.}{Deposit:: MINING MAGAZINE. LUXEMBOURG. AUGUST 1972, PP. 131-132.} |