@book{146175,
	author = {Koerner, Joseph Leo. and ebrary, Inc.},
	title = {Caspar David Friedrich and the subject of landscape},
	publisher = {Reaktion,},
	year = {2009.},
	address = {London :},
	edition = {2nd ed.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10430661}
}