@book{1879,
	title = {Managing commodity price risk in developing countries},
	publisher = {World bank ;},
	year = {1993. },
	address = {Washington (D.C.)},
	note = {La page d'avant-titre porte la mention:"A World bank book." },
	url = {http://catalogue.bnf.fr/ark:/12148/cb375170781}
}