Columbia subject headings:
Harvard subject headings:
Industrial revolution--Portugal.
Portugal--Colonies--Africa--Economic conditions.
Portugal--Colonies--Asia--Economic conditions.
Portugal--Colonies--Economic conditions.
Portugal--Colonies--Economic policy.
Portugal--Economic conditions--19th century.
Portugal--Economic conditions--20th century.
Portugal--Economic conditions.
Portugal--Economic policy.
Portugal--History--1789-1900.
Portugal--History--20th century.
Portugal--Politics and government--20th century.
Princeton subject headings:
Industrial revolution--Portugal.
Portugal--Colonies--Africa--Economic conditions.
Portugal--Colonies--Asia--Economic conditions.
Portugal--Economic conditions--19th century.
Portugal--Economic conditions--20th century.
Portugal--Politics and government--20th century.