@book{115195,
	author = {Unger, Richard W. and ebrary, Inc.},
	title = {Shipping and economic growth 1350-1850},
	publisher = {Brill,},
	year = {2011.},
	series = {Global economic history series,},
	address = {Leiden ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10470636}
}