Columbia subject headings:
Harvard subject headings:
Cartographers--Italy--Naples--Correspondence.
Cartography--Italy--Naples--History--19th century.
Visconti, Ferdinando, 1772-1847--Correspondence.
Princeton subject headings:
Cartographers--Italy, Southern--Correspondence.
Cartography--Italy, Southern--History--19th century.
Visconti, Ferdinando, 1772-1847--Correspondence.