Columbia subject headings:
Harvard subject headings:
Catalonia (Spain)--Economic conditions.
Catalonia (Spain)--History--20th century.
Catalonia (Spain)--History--21st century.
Catalonia (Spain)--Politics and government--20th century.
Catalonia (Spain)--Politics and government--21st century.
Princeton subject headings:
Catalonia (Spain)--Civilization.
Catalonia (Spain)--History.
Catalonia (Spain)--Politics and government.