| Reference | {Deposit:: LAWSON, A.C., 1931, THE PHOSPHATE DEPOSITS OF KHOURIGA, MOROCCO: ECON. GEOL., V. 31, P. 480-484.}{Deposit:: MM 1980; WAR MINERALS REPORT, 1976-1977 P. 119.}{Deposit:: KRAUSS AND OTHERS, 1984, INTERNATIONAL STRATEGIC MINERALS INVENTORY SUMMARY REPORT-- PHOSPHATE: U.S. GEOLOGICAL SURVEY CIRCULAR 930-C, 41 P.}{Deposit:: HARBEN AND BATES, 1984, GEOLOGY OF THE NONMETALLICS: NEW YORK, METAL BULLETIN INC., 393 P.}{Deposit:: MINING MAGAZINE, JANUARY, 1987.}{Production:: LAWSON, 1931; KRAUSS AND OTHERS, 1984} |