@book{9981,
	author = {Plummer, Charles C. and McGeary, David},
	title = {Physical geology /},
	publisher = {Wm. C. Brown Publishers,},
	year = {c1993.},
	address = {Dubuque :},
	edition = {(6th ed.).},
	note = {Includes appendix, glossary and index.}
}