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Path of no resistance.

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اقرأ على الانترنت اقرأ أكثر حفظ في قائمتي
  • المؤلفون: Swarup, Amarendra
  • المصدر:
    New Scientist. 8/19/2006, Vol. 191 Issue 2565, p37-39. 3p. 2 Color Photographs, 2 Diagrams.