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WikiPedia: Mạch nước phun http://www.iogen.ca/news/28_03_2003.html http://www.geocities.com/dmonteit/ov_quick_guide.h... http://geology.com/articles/geyser.shtml http://geysircenter.com/english/geology.html http://news.nationalgeographic.com/news/2007/06/07... http://www.scientificamerican.com/article/instant-... http://www.shpilenok.com/new/index.htm http://www.whakarewarewa.com/ http://www.wyojones.com/geyserdef.htm http://www.wyojones.com/how__geysers_form.htm