@book{81742,
	author = {Buller, Roderic E. and González, Martín H.},
	title = {Grassland and livestock regions of Mexico /},
	publisher = {Escuela Nacional de Agricultura. Departamento de Promoción y Divulgación,},
	year = {1961.},
	address = {Chapingo, Méx. :},
	note = {Enc. con impresos similares},
	url = {http://10.13.5.2/tesis/x85268.pdf}
}