@book{20057,
	author = {Mansilla, Lucio Victorio, and Contreras, Sandra,},
	title = {El excursionista del planeta :},
	publisher = {Fondo de Cultura Económica,},
	year = {2021.},
	series = {Tierra firme},
	address = {Buenos Aires :},
	url = {https://elibro.net/ereader/politecnicointernacional/218935}
}