Columbia subject headings:
Harvard subject headings:
Burgos (Spain)--Church history--Sources.
Cistercians--Spain--Burgos--History--Sources.
Monasterio de Las Huelgas de Burgos (Spain)--History--Sources.
Monasticism and religious orders--Spain--Burgos--History--Middle Ages, 600-1500--Sources.
Princeton subject headings:
Burgos (Spain)--History--Sources.
Monasteries--Spain--Burgos.
Monasterio de Las Huelgas de Burgos (Spain)