1. ASTM C-700, 1983. Vitrified Clay Sewer Pipes, American Society for Testing of Materials, USA
2. BS/EN 295-1991. Clay Drain and Sewer Pipes, British Standards Institute, UK
3. Determining controls on element concentration in cement kiln dust leachate;Duschene;Waste Manage.,1998
4. ES 65 -1986. Egyptian Standards, Specifications for Unglazed Vitrified Clay Pipes, Egyptian Organization for Standardization, Cairo, Egypt
5. El Kholi, M.B., Meshrif A.E., Shurrab, S.A., Serry, M.A., 1994. Utilization of a low grade Sinai clay for manufacturing sewer unglazed vitrified clay pipes. In: Proceedings of the First International Conference on Clays, Cairo, Egypt, pp. 26–35