Columbia subject headings:
Harvard subject headings:
Explorers--Portugal--Biography
Merchants--Portugal--Biography.
Portugal--Biography
Portugal--Colonies--History
Portugal--Commerce--History.
Portugal--History, Naval
Portugal--History--Period of discoveries, 1385-1580
Solis, Duarte Gomes
Voyages and travels--History.
Princeton subject headings:
Portugal--Colonies--History.
Portugal--Commerce--History.
Portugal--History, Naval.
Portugal--History--Period of discoveries, 1385-1580.