@book{6172,
	author = {Prothero, Donald R. and Dott, Robert H.,},
	title = {Evolution of the Earth /},
	publisher = {McGraw-Hill,},
	year = {c2004.},
	address = {Dubuque, Iowa :},
	edition = {7th ed.},
	note = {Dott's name appears first on the earlier edition.},
	url = {http://www.loc.gov/catdir/description/mh031/2003051153.html}
}