Columbia subject headings:
Benedictines--Italy--History--Sources.
Monasticism and religious orders--Italy--Lazio--History.
Montecassino (Monastery)--History--Sources.
Harvard subject headings:
Cassino (Italy)--Biography.
Cassino (Italy)--Church history.
Monasticism and religious orders--Italy--Cassino--History--Sources.
Monks--Italy--Biography.
Montecassino (Monastery)--History--Sources.
Princeton subject headings:
Montecassino (Monastery)--History--Sources.