@book{146517,
	author = {Van Emden, Helmut Fritz. and ebrary, Inc.},
	title = {Aphids as crop pests},
	publisher = {CABI,},
	year = {2007.},
	address = {Wallingford :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10188909}
}