1. Hamad, A. E.: The Development of Agriculture and Fisheries in the Sultanate of Oman. Ministry of Agriculture and Fisheries ?The Sultanate of Oman. International Printing Press, Oman 1981 (In Arabic).
2. Mitwaly, M.; Abu Al Ula, M.: The Geography of the Gulf. El Falah Library, Kuwait 1982 (In Arabic).
3. Powers, R. W.; Ramirez, I. F., Redmond, C. D.; Elberg, E. L.: Geology of the Arabian Peninsula. US Geological Professional Paper No. 6500, Washington (1966)
4. Sultanate of Oman: Ministry of Information and Youth Affairs Publications. Muscat 1979 and 1980.
5. Sultanate of Oman: Monthly Weather Summary (1977?1983). Directorate General of Meteorology, Muscat.