@book{691827,
	author = {"UNITED NATIONS, ECONOMIC COMMISSION FOR EUROPE" and "UNITED NATIONS, ECONOMIC COMMISSION FOR EUROPE"},
	title = {Mapping of the United Nations framwork classification for fossil energy and mineral resources.},
	publisher = {York UN      },
	year = {2009},
	series = {ECE energy series;33},
	address = {New}
}