@book{15730,
	author = {Velthuizen, Harrij van. and Food and Agriculture Organization of the United Nations.},
	title = {Mapping biophysical factors that influence agricultural production and rural vulnerability /},
	publisher = {Food and Agriculture Organization of the United Nations,},
	year = {c2007.},
	series = {Environment and natural resources series ;},
	address = {Rome :},
	url = {ftp://ftp.fao.org/docrep/fao/010/a1075e/a1075e00.pdf}
}