@book{5814,
	author = {Vogt, Guillermo and Villagrán   , Francisco, prol.},
	title = {El hombre y la tierra. Palabras preliminares de Francisco Villagrán.},
	publisher = {Ministerio de Cultura, Departamento Editorial,},
	year = {1958},
	address = {San  Salvador, El Salvador:},
	edition = {2aed.}
}