@book{242538,
	author = {Johnson, Adrian Miles},
	title = {America explored : a cartographical history of the exploration of North America / A. Johnson},
	publisher = {Viking Press},
	year = {1974},
	address = {New York},
	note = {Contenido: 1- Landfalls and exploration of the North America coastline by European sailors   2- The first attempts to penetrate and colonize North America  3- The European penetration into the interior of the North America continent  4- The American expeditions to the west (1803-1852) and their influence on the mapping of North America    Donación Dr. Federico B. Vervoorst}
}