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WikiPedia: Urani http://www.answers.com/uranium http://www.atomicarchive.com/Docs/Begin/Nature_Mei... http://www.britannica.com/EBchecked/topic/619116 http://www.freerepublic.com/focus/f-news/1451707/p... http://books.google.com/?id=F7p7W1rykpwC&pg=PA75 http://books.google.com/?id=KWGu-LYMYjMC&pg=PA108 http://books.google.com/?id=j-Xu07p3cKwC&printsec=... http://books.google.com/?id=qDf3AO8nILoC&pg=PA1468 http://www.investcom.com/moneyshow/uranium_athabas... http://journals.lww.com/joem/pages/articleviewer.a...