@book{145093,
	author = {Giller, K. E. and ebrary, Inc.},
	title = {Nitrogen fixation in tropical cropping systems},
	publisher = {CABI Pub.,},
	year = {c2001.},
	address = {Wallingford, Oxon, UK ;},
	edition = {2nd ed.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10185860}
}