[1] Al-Rayhani, Q., & Al-Samoraay. (1990). Geography of Arid Lands. Bagdad: University of Bagdad.
[2] Al-Shomaa’, S. A.-K. (1980). Agricultural Areas in Iraq. Al Najaf: Ministry of Agricultural.
[3] Arichi, M. S. (2001). The Factors Affect the Urban Fringe in Assir Area and Effects of Services in the Fringe Contrast. Jeddah: King Abdulaziz University.
[4] Mohsen, A. S. (2012). Geographic Analysis of Population Alnajaf Province Rural and Urban Settlements. Journal of Education, 5.
[5] Planning, M. O. (2004). Results of Census, 1425H (2004). Riyadh: Government Report.
[6] Planning, M. O. (2010). Preliminary Results of Census, 1431H. Riyadh: Government Report.
[7] Siam, N. M. M. (1987). Distribution of Settlements in Syria. Riyadh: Imam Muhammad Ibn Saud Islamic University.
[8] Subhi, A. H. M. (1995). Population Distribution. Bairout: Dar Alhuda publishing Inc.