Columbia subject headings:
Castilla y León (Spain)--Foreign relations.
Castilla y León (Spain)--History.
Castilla y León (Spain)--Social conditions.
Power (Social sciences)--Spain--Castilla y León.
Harvard subject headings:
Land tenure--Spain--Castile--History.
Libro becerro de las behetrías.
Power (Social sciences)--Spain--Castile--History.
Social structure--Spain--Castile--History.
Princeton subject headings:
Land tenure--Spain--Castile--History.
Libro becerro de las behetrías.
Power (Social sciences)--Spain--Castile--History.
Social structure--Spain--Castile--History.