@book{38951,
	author = {Ludwig, George H. and ebrary, Inc.},
	title = {Opening space research},
	publisher = {American Geophysical Union,},
	year = {c2011.},
	address = {Washington, DC :},
	note = {At head of title: Geopress.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10726750}
}