@book{87312,
	author = {Sánchez Méndez, Ricardo Israel.},
	title = {Estado del conocimiento de Pinus arizonica Engelm},
	publisher = {El autor,},
	year = {2003.},
	address = {Chapingo, Méx. :},
	url = {http://10.13.5.2/tesis/98829.pdf}
}