@book{18895,
	author = {Bombelli, A. and Food and Agriculture Organization of the United Nations.},
	title = {Africa and the carbon cycle :},
	publisher = {Food and Agriculture Organization of the United Nations,},
	year = {2011.},
	series = {World soil resources reports,},
	address = {Rome :},
	url = {http://www.fao.org/docrep/014/i2240e/i2240e.pdf}
}