@book{35030,
	author = {Lutgens, Frederick K. and Tarbuck, Edward J.},
	title = {Essentials of geology /},
	publisher = {Prentice Hall,},
	year = {c2000.},
	address = {Upper Saddle River, NJ :},
	edition = {7th ed.},
	note = {Includes index.}
}