@book{99535,
	author = {Hernández Espinosa, Ana Lilia. and González Estrada, Adrián},
	title = {Las fluctuaciones cíclicas de la produccón agropecuaria de México},
	publisher = {El autor,},
	year = {2010.},
	address = {Chapingo, Méx. :},
	url = {http://10.13.5.2/tesis/111193.pdf}
}