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1-International Scientific Committee " International Conference ENERGY PLANNING, ENERGY SAVING, ENVIRONMENTAL EDUCATION (EPESE'07),Arcachon, France, October14-16,2007, http://www.wseas.org/conferences/2007/france/res/
2-International Scientific Committee The 5th WSEAS International Conference "ENVIRONMENT, ECOSYSTEMS and DEVELOPMENT (EED'07), http://www.wseas.org/conferences/2007/tenerife/eed/ 3-Membership "The Europian Association for the Conservation of the Geological Heritage (Pro GEO)" Web address:http://www.progeo.se
Puerto De La Cruz, Tenerife, Canary Islands, Spain, December 14-16, 2007,