Columbia subject headings:
Bologna (Italy)--Imprints--Union lists.
Broadsides--Italy--Bologna--15th and 16th centuries--Union lists.
Early printed books--Italy--Bologna--16th century--Union lists.
Pamphlets--Italy--Bologna--Union lists.
Proclamations--Italy--Bologna--Union lists.
Union catalogs--Italy.
Harvard subject headings:
Bologna (Italy)--History--Sources--Bibliography--Union lists.
Bologna (Italy)--Imprints--Union lists.
Bologna Region (Italy)--History--Sources--Bibliography--Union lists.
Early printed books--Italy--Bologna--16th century--Union lists.
Princeton subject headings:
Bologna (Italy : Province)--History--Sources--Catalogs.
Proclamations--Italy--Bologna (Province)--Catalogs.