Columbia subject headings:
Elite (Social sciences)--Spain--Castile.
Families--Spain--Castile--History.
Nobility--Spain--Castile--History.
Harvard subject headings:
Elite (Social sciences)--Spain--Castile.
Families--Spain--Castile--History.
Nobility--Spain--Castile--History.
Princeton subject headings:
Elite (Social sciences)--Spain--Castile.
Families--Spain--Castile--History.
Nobility--Spain--Castile--History.