@book{89036,
	author = {Becerra Pedraza, Itzel Adriana},
	title = {Estudio comparativo del trabajo infantil en el comercio exterior agroalimentario de Brasil, Costa Rica, Guatemala y México /},
	publisher = {El autor,},
	year = {2004.},
	address = {Chapingo, Méx. :},
	url = {http://10.13.5.2/tesis/100564.pdf}
}