Columbia subject headings:
Harvard subject headings:
Church history--Middle Ages, 600-1500
Diplomatics.
Feudalism.
France--History--Medieval period, 987-1515.
Middle Ages.
Princeton subject headings:
Church history--Middle ages, 600-1500--Periodicals.
Ecole national des chartes (France)--Periodicals.
Feudalism--France--Periodicals.
France--History--Medieval period, 987-1515--Periodicals.
Middle Ages--History--Periodicals.
Periodicals.