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