1. Effects of long-term wastewater irrigation on soil properties;Angin;Journal of Sustainable Agriculture,2005
2. APHA-AWWA-WEF, 2005. Standard Methods for the Examination of Water and Wastewater, American Public Health Association, American Water works Association and Water Environment Federation, Eaton A., Clesceri L., Rice E. and Greenberg A. (eds) 21st ed. Washington, DC. ISBN: 0875530478.
3. Ayers, R.S., Westcot, D.W., 1985. Water quality for agriculture. FAO Irrigation and drainage paper 29. FAO. ISBN: 92-5-102263-1.
4. Barcenas, A., 2004. Internal CONAGUA document: list of crops to be grown and their water requirements for Irrigation district 003-Tula, for the agricultural cycle 2004–2005 (In Spanish). Prepared by operations manager for irrigation district 003-Tula, Ing. Andres Barcenas Cuevas.
5. Nutritional Disorders of Plants: Development, Visual and Analytical Diagnosis;Bergmann,1992