@book{98127,
	author = {Ramírez López, Elias.},
	title = {Análisis del sistema naranja - vainilla en la región del Totonacapan, Estado de Veracruz},
	publisher = {El autor,},
	year = {2009},
	address = {Chapingo, Méx. :},
	url = {http://10.13.5.2/tesis/109784.pdf}
}