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![](./images/clear.gif) 1.- Natural emissions of methane from geothermal and volcanic sources in Europe
Elsevier; Amsterdam; NLD; Netherlands, 2007
Gas geochemistry and Earth degassing
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![](./images/clear.gif) 2.- SOIL DEGASSING AT USTICA ISLAND: COMPARISON BETWEEN 1997 AND 1999 SURVEYS
2002
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