Columbia subject headings:
Bologna (Italy : Province)--Population.
Bologna (Italy : Province)--Social conditions.
Catholic Church--Italy--Bologna (Province)
Church buildings--Italy--Bologna (Province)
Reno River Valley (Italy)--Church history.
Harvard subject headings:
Bologna (Italy : Province)--Population.
Bologna (Italy : Province)--Social conditions.
Catholic Church--Italy--Bologna (Province)
Church buildings--Italy--Bologna (Province)
Reno River Valley (Italy)--Church history.
Princeton subject headings: