@book{100939,
	author = {Birkás, Márta. and ebrary, Inc.},
	title = {Environmentally-sound adaptable tillage},
	publisher = {Akadémiai Kiadó,},
	year = {2008.},
	address = {Budapest :},
	url = {http://site.ebrary.com/lib/strathmore/Doc?id=10294849}
}