1. APHA. (1995). Standard methods for the examination of water and wastewater (19th ed., p. 1,467). Washington: American Public Health Association.
2. Back, W. (1966). Hydrochemical facies and groundwater flow patterns in the northern part of the Atlantic coastal plain, USGS prof. Paper 498-A.
3. Back, W., & Hanshaw, B. B. (1965). Chemical geohydrology. Advanced Hydrodynamics Science, 1, 49–109.
4. Burdon, D. J. & Mazloum, S. (1958). Some chemical types of groundwater from Syria. UNESCO Symposium, Tehran (pp. 73–90).
5. Chow, V. T. (1964). Handbook of applied hydrology (p. 1453). New York: McGraw-Hill.