Publisher
- Irgun ʻovde ha-mayim (Israel) 5
- Unesco 5
- United Nations Environment Programme 5
- United States. Foreign Broadcast Information Service 5
- American Society of Civil Engineers 4
- Society for International Development. Israel Chapter 4
- Sudan. Wizārat al-Iʻlām wa-al-Thaqāfah 4
- Turkey. Devlet Su İşleri Genel Müdürlüğü 4
- American University (Washington, D.C.) 3
- Institut agronomique méditerranéen de Montpellier 3
- International Irrigation Management Institute 3
- Jordan. Sulṭat al-Maṣādir al-Ṭabīʻīyah 3
- La Documentation française 3
- Longman (Firm) 3
- Robert S. Kerr Environmental Research Laboratory 3
- Trud 3
- United States. Bureau of Reclamation 3
- University of London. School of Oriental and African Studies 3
- Christian Science Publishing Society 2
- Great Britain. Crown Agents for the Colonies 2