Columbia subject headings:
Amazon River Valley--Discovery and exploration.
Vertebrates--Amazon River Valley.
Zaparo language.
Harvard subject headings:
Amazon River Valley--Description and travel.
Amazon River Valley--Discovery and exploration--Italian.
Napo River Valley (Ecuador and Peru)--Description and travel.
Napo River Valley (Ecuador and Peru)--Discovery and exploration--Italian.
Osculati, Gaetano, 1808-1894--Travel--Amazon River Valley.
Vertebrates--Amazon River Valley.
Zaparo language.
Princeton subject headings: