| Reference | {Deposit:: INDUSTRIAL MINERALS. PORTUGUESE PYRITES, SEPT. 1980,}{Deposit:: P. 47.}{Deposit:: MINING JOURNAL. MINING ANNUAL REVIEW, 1981.}{Deposit:: SULFUR. EXPANSION PLANS AT ALJUSTREL, NO. 148, MAY/JUNE}{Deposit:: 1980.}{Deposit:: BRITISH SULFUR. WORLD SURVEY OF SULFUR RESOURCES, 2ND.}{Deposit:: ED., 1974.} |