@book{29331,
	author = {Almela, Antonio. and Sanz, Ruperto,},
	title = {Resumen de la historia geológica de la tierra},
	publisher = {Tip Lit. Coullaut,},
	year = {1958.},
	series = {Memorias del Instituto Geológico y Minero de España,},
	address = {Madrid,}
}