1. Barreno, R.F., 1971. Coliform concentrations in vegetables irrigated with sewage. Ph.D. thesis, University of Oklahoma, Norman
2. Wastewater irrigation of fruit trees;Basiouny;BioCycle,1982
3. Bernstein, L., 1964. Salt tolerance of plants. Agricultural Information Bulletin, USDA, Washington, D.C. 283, p. 23
4. Recycling municipal wastewater for hydroponic culture;Berry;HortScience,1977
5. Utilization of municipal wastewater for culture of horticultural crops;Berry;HortScience,1980