Columbia subject headings:
Harvard subject headings:
Africa, West--Discovery and exploration--Portuguese.
Portugal--History--Period of discoveries, 1385-1580.
São Tomé Island (Sao Tome and Principe)--Discovery and exploration--Portuguese.
Voyages and travels
Princeton subject headings:
Africa, West--Discovery and exploration--Portuguese.
Portugal--History--Period of discoveries, 1385-1580.
São Tomé Island (Sao Tome and Principe)--Discovery and exploration--Portuguese.
Voyages and travels.