@book{14540,
	author = {Graaff, J. de. and ebrary, Inc.},
	title = {Monitoring and evaluation of soil conservation and watershed development projects},
	publisher = {Science Publishers,},
	year = {c2007.},
	address = {Enfield, NH :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10256235}
}