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2. Abolkhair, Y.: Sand movement in Al-Hasa. The Kuwaiti Geogr. Association Periodical, 64, 1?31 (1984) (Arabic)
3. Abolkhair, Y.: The Size Characteristics of the Drifting Sand Grains in Al-Hasa Oasis, Saudi Arabia. GeoJournal 11, 2 (1985)
4. Al-Qasim, L.: The Eolian deposits in the Eastern province of Saudi Arabia. Unpublished M.A. Thesis. Geography Department, College of Education for Girls, Directorate General of Education for Girls, Riyadh, Saudi Arabia, 1986 (Arabic).
5. Al-Saud, M.: Sand drift and its size characteristics in Ad-Dahna desert on the Riyadh-Dammam highway. Unpublished M.A. Thesis, Geogr. Dept, King Saud University, Riyadh, Saudi Arabia, 1985 (Arabic).