Columbia subject headings:
Harvard subject headings:
Azores--Genealogy.
Azores--History--Sources.
Azores--History.
Portugal--History--Period of discoveries, 1385-1580.
Portugal--History--To 1385.
World history--Early works to 1800
Princeton subject headings:
Azores--Description and travel--Early works to 1800.
Azores--History--Early works to 1800.
Portugal--Description and travel--Early works to 1800.
Portugal--History--Early works to 1800.