1. APHA, 1992. Standard methods for the examination of water and wastewater. In: Greenberg, A.E., Clesceri, L.S., Eaton, A.D. (Eds.), American Public Health Association, 18th ed., Washington, USA
2. ASTM, 1985. Preparation of biological samples for inorganic chemical analysis. Annual Book of ASTM Standards, vol. D-19, pp. 740–747
3. Air Quality Control;Baumbach,1996
4. Ekoloji-II Toprak;Boşgelmez,2001
5. A rapid method for the determination of total sulfur in soils and plants;Butters;Analyst,1959