Columbia subject headings:
Bologna (Italy)--History--1860-1945.
World War, 1939-1945--Underground movements--Italy--Bologna.
Harvard subject headings:
Bologna (Italy)--History--1860-1945
World War, 1939-1945--Underground movements--Italy--Bologna.
Princeton subject headings:
Bologna (Italy)--History--1860-1945.
World War, 1939-1945--Underground movements--Italy--Bologna.