@book{153645,
	author = {Illinois State Geological Survey, ISGS},
	title = {History of Oil and Gas Production in Illinois},
	publisher = {Illinois State Geological Survey, ISGS},
	year = {2004},
	address = {Illinois},
	note = {Página web visitada en enero de 2004. ; Navegadores de Internet},
	url = {http://www.isgs.uiuc.edu/servs/pubs/geobits-pub/geobit8/geobit8.htm}
}