@book{121271,
	author = {Haberle, R. M. and United States.},
	title = {Mars, past, present, and future},
	publisher = {Lunar and Planetary Institute ;},
	year = {1993]},
	series = {NASA contractor report ;},
	address = {Houston, Tex. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10516739}
}