| Reference | CONNOR, K., THE MINERAL INDUSTRY OF SUDAN, PREPRINT FROM THE 1982 UNITED STATES BUREAU OF MINES MINERALS YEARBOOK, P. 5.. . SHADDAD, M. Z., 1983, SUDAN, MINING ANNUAL REVIEW - 1983, LONDON MINING JOURNAL LTD., P. 431.. . AHMED, A.A.M., 1979, GENERAL OUTLINE OF THE GEOLOGY AND MINERAL OCCURRENCES OF THE RED SEA HILLS, SUDAN, MINISTRY OF ENERGY AND MINING, GEOLOGICAL AND MINERAL RESOURCES DEPARTMENT, BULLETIN NO. 30, P. 45 |