1. b: geology and phosphate deposits of Wasif, Safaga area, Egypt;Akkad;Geological survey of Egypt,1966
2. Petrogenic studies of some upper cretaceous and Eocene formations from Safaga and kosseir area;Anwar;J. Geology URA,1960
3. U. Cretaceous – L. Tertiary planktonic biostratigraphy along the Egyptian Red Sea region and its tectonic implication;Aref;Bull. Fac. Sci. Assiut Univ.,1988
4. Rare earth elements in core marine sediments of coastal East Malaysia by instrumental neutron activation analysis;Ashraf;Appl. Radiat. Isot.,2016
5. Zonal stratigraphy of the Kharga Oasis;Awad;Geological Survey of Egypt, Cairo,1965