Columbia subject headings:
Harvard subject headings:
Amazon River Region--Discovery and exploration.
Indians of South America--History--19th century.
Michelena y Rojas, Francisco, 1801-1872--Travel--South America.
Natural history--South America
Orinoco River Region (Venezuela and Colombia)--Discovery and exploration.
South America--Description and travel
South America--Discovery and exploration.
Princeton subject headings:
Amazon River--Discovery and exploration.
Brazil--Description and travel.
Orinoco River (Venezuela and Colombia)--Discovery and exploration.
South America--Description and travel.
Venezuela--Exploring expeditions.