Columbia subject headings:
Harvard subject headings:
Albuquerque, Afonso de, 1453-1515
Covilhã, Pêro da.
Dias, Bartolomeu.
Eanes, Gil, active 15th century.
Portugal--History--Period of discoveries, 1385-1580.
Princeton subject headings:
Discoveries in geography--Portuguese.
Portugal--Colonies.
Portugal--History--Period of discoveries, 1385-1580.