REFERENCES
- U.S. Department of Health and Human Services, Agency for Toxic Substances and Disease Registry . 1988 . The Nature and Extent of Lead Poisoning in Children in the United States: A Report to Congress
- Grant , L. D. and Davis , J. M. 1989 . Lead Exposure and Child Development: An International Assessment Edited by: Smith , M. S. , Grant , L. D. and Sors , A. I. 49 – 115 . London : Kluwer Academic Publishers. .
- Goyer , R. A. 1986 . Casarett and Doull's Toxicology , Third Edition Edited by: Klassen , C D. , Amdur , M. O. and Doull , J. New York : Macmillan. .
- EPA . 1985 . Cadmium contamination of the environment: An assessment of nationwide risk Washington, DC : U.S. EPA, Office of Water Regulations and Standards. . EPA-440/4–85–023
- Bao-hou , L. , Zhong-quan , Y. and Kai , H. 1988 . “Determination of Si, Al, Ca, Mg, Fe, Ti, Mn, Cu, Co and Ni in Vanadium-Titanium-Iron Ore by Microwave Oven Digestion, ICP, AA and Chemical Analysis Methods.” Institute of Chemical Industry and Metallurgy. The Academy of Sciences of China. .
- Totla Jarvis , M. and Jarvis , K. E. 1992 . Chem. Geol. , 95 : 35
- Que Hee , S. S. and Boyle , J. R . 1988 . Anal. Chem. , 60 : 1033
- Bettinelli , M. , Baroni , U. and Pastorelli , N. 1987 . Anal. At. Spectrom. , 2 : 485
- Wen , X. , Wu , L. , Zhang , Y. and Chu , Y. 1997 . Fresenius Z. Anal. Chem. , 357 : 1111
- Nakashima , S. , Sturgeon , R. E. , Willie , S. N. and Berman , S. S. 1988 . Analyst , 113 : 159
- Krause , P. , Erbsloh , B. , Niedergasab , R. , Pepelnik , R. and Prange , A. 1995 . Fresenius Z. Anal. Chem. , 353 : 3
- Bettinelli , M. , Baroni , U. and Pastorelli , N. 1987 . Anal At. Spectrom. , 2 : 485