1. The April 1990 phreatic activity of Guagua Pichincha volcano (Ecuador);Barberi,1991
2. The April 1990 phreatic activity of Guagua Pichincha volcano (Ecuador);Barberi,1991
3. Thermochemical Properties of Inorganic Substances;Barin,1973
4. Carbon monoxide in geothermal gases;Bertrami,1985
5. Gas geobarometry for hydrothermal systems and its application to some Italian geothermal areas;Chiodini;Appl. Geochem.,1989