Columbia subject headings:
Early printed books--19th century--Union lists.
Italian imprints--Union lists.
Italy--Imprints--Catalogs.
Union catalogs--Italy.
Harvard subject headings:
Italian imprints--Italy--Union lists.
Italy--Bibliography--Union lists.
Italy--Imprints--Union lists.
Union catalogs--Italy.
Princeton subject headings:
Bibliography--Italy--Early printed books--19th century.
Italy--Imprints--Catalogs.
Union catalogs--Italy.