Columbia subject headings:
Cistercians--Spain--History--Sources.
León (Spain : Province)--History--Sources.
Monasterio de Santa María de Gradefes--History--Sources.
Monasticism and religious orders--Spain--History--Middle Ages, 600-1500--Sources.
Harvard subject headings:
Cistercians--Spain--History--Sources.
León (Spain : Province)--History--Sources.
Monasterio de Santa María de Gradefes--History--Sources.
Monasticism and religious orders--Spain--History--Middle Ages, 600-1500--Sources.
Princeton subject headings:
Cistercians--Spain--History--Sources.
León (Spain : Province)--History--Sources.
Monasterio de Santa María de Gradefes--History--Sources.
Monasticism and religious orders--Spain--History--Middle Ages, 600-1500--Sources.