@book{99693,
	author = {Calvillo Arriola, Atzin Elihu and Guízar Nolazco, Enrique},
	title = {Flora y vegetacion del cerro El Fortín, Oaxaca de Juárez, Oaxaca},
	publisher = {El autor,},
	year = {2009.},
	address = {Chapingo, Méx. :},
	url = {http://10.13.5.2/tesis/111351.pdf}
}