@book{68600,
	author = {Porto, António Francisco Ferreira da Silva,},
	title = {Silva Porto e Livingstone :},
	publisher = {Project Gutenberg,},
	year = {2009},
	address = {Salt Lake City, UT :},
	note = {Release date is 2009-01-03},
	url = {https://www.gutenberg.org/ebooks/27691}
}