@book{2481,
	author = {Levin, Harold L.},
	title = {The earth through time /},
	publisher = {J. Wiley,},
	year = {c2003.},
	address = {Hoboken, NJ :},
	edition = {7th ed.},
	url = {http://www.loc.gov/catdir/bios/wiley046/2003265447.html}
}