@book{91432,
	author = {Alvarado Ruiz, Luis Heliézer. and Reyna Mendoza, Joan.},
	title = {El mercado ecológico en Alemania :},
	publisher = {El autor,},
	year = {2005.},
	address = {Chapingo, Méx. :},
	url = {http://10.13.5.2/tesis/102968.pdf}
}