@book{90235,
	author = {Cicero, Marcus Tullius, and Pimentel Alvarez, Julio.},
	title = {Sobre la naturaleza de los dioses},
	publisher = {Aguilar Argentina S.A. de Ediciones},
	year = {1970.},
	series = {Biblioteca de Iniciación Filosófica, no. 65,[bis]},
	address = {Argentina},
	note = {Spanish and Latin on opposite pages numbered in duplicate.}
}