@book{315,
	author = {Casas, Bartolome de las and O'Gorman, Edmundo, },
	title = {Los Indios de México y Nueva España  },
	publisher = {Porrúa },
	year = {1979},
	series = {" Sepan cuantos ......."},
	address = {México},
	edition = {4a ed}
}