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المصدر: Environmental Health Perspectives, 2002 Aug 01. 110(8), 817-822.

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المؤلفون: Knobeloch, Lynda, Salna, Barbara, Hogan, Adam, Postle, Jeffrey, Anderson, Henry

المصدر: Environmental Health Perspectives, 2000 Jul 01. 108(7), 675-678.

URL الوصول: https://www.jstor.org/stable/3434890

المؤلفون: Gupta, Sunil Kumar, Gupta, R. C., Gupta, A. B., Seth, A. K., Bassin, J. K., Gupta, Alka

المصدر: Environmental Health Perspectives, 2000 Apr 01. 108(4), 363-366.

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المؤلفون: Avery, Alexander Austin

المصدر: Environmental Health Perspectives, 1999 Jul 01. 107(7), 583-586.

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المصدر: Environmental Health Perspectives, 2003 Dec 01. 111(16), 1902-1905.

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المصدر: The American Biology Teacher, 2003 Jan 01. 65(1), 41-46.

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المصدر: Clinical Infectious Diseases, 2001 Dec . 33(12), 1990-1997.

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المصدر: Environmental Health Perspectives, 2006 Aug 01. 114(8), A459-A461.

URL الوصول: https://www.jstor.org/stable/3655915