References
- Underwood , E. J. 1971 . Trace elements in Human and Animal Nutrition , 545 New York, , USA : Academic Press .
- Yeh , S. J. , Chen , P. Y. , Ke , C. N. , Hsu , S. T. and Tanaka , S. 1976 . Anal. Chim. Acta , 87 : 119 – 124 .
- 1973 . Trace Elements in Human Nutrition , Techn. Rep. Ser. No. 532 Geneva : World Health Organization .
- Qureshi , I. H. , Mannan , A. , Zaidi , J. H. , Arif , M. and Khalid , N. 1990 . Intern. J. Environ. Anal. Chem , 38 : 565 – 577 .
- Khursheed , S. J. and Qureshi , I. H. 1984 . The Nucleus , 21 : 3 – 23 .
- Roberts , H. R. 1981 . Food Safety , 77 New York : Wiley . Chap. 3
- Clemente , G. F. 1976 . J. Radioanal. Chem. , 32 : 25 – 41 .
- Ahmad , S. , Chaudhary , M. S. , Mannan , A. and Qureshi , I. H. 1983 . J. Radioanal. Chem. , 78 : 375 – 383 .
- Waheed , S. , Fatima , I. , Mannan , A. , Chaudhary , M. S. and Qureshi , I. H. 1985 . Intern. J. Environ. Anal. Chem. , 21 : 333 – 344 .
- Fatima , I. , Waheed , S. , Mannan , A. and Qureshi , I. H. 1985 . Toxicol. and Environ. Chem. , 10 : 321 – 332 .
- Qureshi , I. H. , Zaidi , J. H. , Arif , M. and Fatima , I. 1990 . Intern. J. Environ. Anal. Chem. , 43 : 25 – 31 .
- 1983 . The New Encyclopaedia Britannica , 15th ed. Chicago, , USA
- Tanner , J. T. and Friedman , M. H. 1977 . J. Radioanal. Chem , 37 : 529 – 538 .
- Qureshi , I. H. , Chaudhary , M. S. and Ahmad , S. 1982 . J. Radioanal. Chem. , 68 : 209 – 218 .
- Lederer , C. M. and Shirley , V. S. 1978 . Table of Isotopes , 7th ed. , New York, , USA : Wiley .
- Ila , P. and Jagam , P. 1980 . J. Radioanal. Chem. , 57 : 205 – 210 .
- Sherif , M. K. , Awadallah , R. M. and Mohamed , A. E. 1979 . J. Radioanal. Chem. , 53 : 145 – 153 .
- Sherif , M. K. , Awadallah , R. M. and Amrallah , A. H. 1980 . J. Radioanal. Chem. , 57 : 53 – 60 .
- 1974 . Recommended Dietary Allowance, National Academy of Science , 8th ed. Washington, , DC, USA