Columbia subject headings:
Land tenure--Spain--Soria (Province)
Oligarchy--Spain--Soria (Province)
Soria (Spain : Province)--Politics and government.
Harvard subject headings:
Nobility--Spain--Soria--Political activity--History.
Power (Social sciences)--Spain--Soria--History.
Social structure--Spain--Soria--History.
Soria (Spain)--Politics and government.
Soria (Spain)--Social conditions.
Princeton subject headings: