Columbia subject headings:
Harvard subject headings:
Castilla y León (Spain)--Economic conditions.
Castilla y León (Spain)--Social conditions.
Feudalism--Spain--Castile.
Feudalism--Spain--León.
Land tenure--Spain--Castile--History.
Land tenure--Spain--León--History.
Social classes--Spain.
Princeton subject headings:
Castilla y León (Spain)--Economic conditions.
Castilla y León (Spain)--Social conditions.
Land tenure--Spain--Castilla y León--History.