Columbia subject headings:
Harvard subject headings:
Archivio di Stato di Napoli--Catalogs.
Bonghi, Ruggiero, 1826-1895--Archives--Catalogs.
Princeton subject headings:
Bonghi, Ruggiero, 1826-1895--Archives--Catalogs.
Catalogs.
Intellectuals--Italy--Archives--Catalogs.
Italy--Politics and government--1870-1914--Sources--Bibliography--Catalogs..
Politicians--Italy--Archives--Catalogs.