Columbia subject headings:
Archives--Germany.
Archives--Italy.
Diplomatics.
Germany--History--Sources.
Italy--History--Sources.
Harvard subject headings:
Archives--Germany
Archives--Italy
Diplomatics.
Germany--History--Sources.
Italy--History--Sources.
Princeton subject headings:
Archives--Germany.
Archives--Italy.
Diplomatics.
Germany--History--Sources.
Italy--History--Sources.