@book{60109,
	author = {Undiano y Gastelu, Sebastian},
	title = {Proyecto de traslacion de las fronteras de Buenos Aires al Rio Negro y Colorado},
	publisher = {Project Gutenberg,},
	year = {2006},
	address = {Salt Lake City, UT :},
	note = {Release date is 2006-07-01},
	url = {https://www.gutenberg.org/ebooks/18723}
}