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Ashraf, W., Jaffar, M. & Mohammad, D. Levels of selected trace metals in hair of urban and rural adult male population of Pakistan. Bull. Environ. Contam. Toxicol. 54, 207–213 (1995). https://doi.org/10.1007/BF00197432
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DOI: https://doi.org/10.1007/BF00197432