@book{11270,
	author = {Pearson, C. J. and Ison, R. L. and ebrary, Inc.},
	title = {Agronomy of grassland systems},
	publisher = {Cambridge University Press,},
	year = {1997.},
	address = {Cambridge [England] ;},
	edition = {2nd ed.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10014979}
}