Columbia subject headings:
Etiquette--Spain.
Juan Carlos I, King of Spain, 1938-
Monarchy--Spain--History--20th century.
Titles of honor and nobility--Spain.
Harvard subject headings:
Etiquette--Spain.
Juan Carlos I, King of Spain, 1938-
Monarchy--Spain--History--20th century.
Monarchy--Spain--History--21st century.
Titles of honor and nobility--Spain--History.
Princeton subject headings:
Etiquette--Spain.
Juan Carlos I, King of Spain, 1938-
Monarchy--Spain--History--20th century.
Titles of honor and nobility--Spain.