| Reference | {Deposit:: BRITISH SULPHUR CORP. LTD., 1980: WORLD SURVEY OF PHOSPHATE DEPOSITS, 4TH ED., LONDON}{Deposit:: OUSSEDIK, M. ET AL., 1979: LES MINERALISATIONS PHOSPHATES EOCENES EN ALGERIE..., DOCUMENTS DU BRGM, NO.24, 1980, P.141-154, ORLEANS}{Production:: THE SECOND ARAB CONFERENCE FOR MINERAL RESOURCES, 1974, PART III, P.68, JEDDAH} |