1. 1. A. Kabata-Pendias and H. Pendias, “Trace Elements in Soils and Plants”, 1984, CRC Press, Boca Raton, Fl, 1 - 68, 193 - 199.
2. 2. H. A. Schroeder, J. J. Balassa, and I. H. Tipton, J. Chron. Dis., 1962, 15, 941.
3. 3. Agency for Toxic Substances and Disease Registry (ATSDR), “Toxicological Profile for Chromium”, 1993, U.S. Public Health Service, U.S. Department of Health and Human Services, Atlanta, GA.
4. 4. E. Merian, “Metals and Their Compounds in the Environment, Occurance, Analysis and Biological References”, 1980, VCH, New York.
5. Determination of hexavalent chromium in sludge incinerator emissions using ion chromatography and inductively coupled plasma mass spectrometry