Columbia subject headings:
Harvard subject headings:
Archival resources--Italy--Rome.
Baltic Sea Region--History--Archival resources.
Catholic Church--Archives.
Northern War, 1700-1721--Sources--Bibliography--Catalogs.
Princeton subject headings:
Archival resources--Italy--Rome.
Baltic Sea Region--History--Archival resources.
Catholic Church--Archives.
Northern War, 1700-1721--Sources--Bibliography--Catalogs.