Columbia subject headings:
Harvard subject headings:
Castile (Spain)--Church history.
Church lands--Spain--Castile--History.
Monasterio de Santa María la Real de Aguilar de Campóo--History.
Princeton subject headings:
Abadengo de Aguilar de Campoo--History--Sources.
Abadengo de Aguilar de Campoo--History.
Agriculture--Economic aspects--Spain--Castile--History.
Church lands--Spain--Castile--History.
Land tenure--Spain--Castile--History.