@book{89931,
	author = {López Santiago, Juan.},
	title = {Caracterización morfológica de estructuras vegetativas y reproductivas de tejocote (Crataegus spp.) /},
	publisher = {El autor,},
	year = {2005.},
	address = {Chapingo, Méx. :},
	url = {http://10.13.5.2/tesis/101460.pdf}
}