Reference | {Deposit:: BRITISH SULPHUR CORP. LTD., 1980: WORLD SURVEY OF PHOSPHATE DEPOSITS, 4TH ED., LONDON}{Deposit:: BOUJO A., 1976: CONTRIBUTION A *TUDE GEOLOGIQUE DU GISEMENT DE PHOSPHATE CRETACE-EOCENE DES GANNTOUR. NOTES ET MEM. DU SERV. GEOL. MAROC, NO.262, RABAT} |