BIBLIOGRAPHY



Calvache V., M.L., 1995, The geological evolution of Galeras Volcanic Complex Ph.D. Dissertation, Arizona State University, 144 p.

http://earthview.sdsu.edu/trees/volqest.html

http://pubs.usgs.gov/gip/monitor/contents.html

http://pubs.usgs.gov/gip/volc/types.html

http://spso2.gsfc.nasa.gov/NASA_FACTS/volcanoes/volcano.html

http://volcano.und.nodak.edu/volc_of_world.html

http://vulcan.wr.usgs.gov/Volcanoes/framework.html

http://www.inmind.com/schools/lessons/volcanoes.html

http://www.learner.org/exhibits/volcanoes/entry.html