@book{19981,
	author = {Lutgens, Frederick K. and Tarbuck, Edward J.},
	title = {Essentials of Geology /},
	publisher = {Pearson Prentice Hall,},
	year = {c2009.},
	address = {Upper Saddle River, N.J. :},
	edition = {10th ed.},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/toc/ecip086/2007049182.html}
}