@book{4715,
	author = {Pipkin, Bernard W. and Trent, D. D.; Hazlett, Richard; Bierman, Paul},
	title = {Geology and the environment /},
	publisher = {Thomson Books/Cole,},
	year = {2008.},
	address = {U.S.A :},
	edition = {5th},
	note = {Includes glossary and index}
}