@book{218906,
	author = {Carreño Lopez, Magda Veronica and Valle Sánchez, Manuel del},
	title = {Valoración económica para el área natural protegida Cañon del Sumidero :},
	publisher = {El autor,},
	year = {2019.},
	address = {Chapingo, México :},
	url = {http://10.13.5.2/tesis/tm/Carreno_Lopez_Magda_Veronica.pdf}
}