Columbia subject headings:
Harvard subject headings:
Church records and registers--Italy--Viterbo.
S. Stefano (Church : Viterbo, Italy)--History--Sources.
Viterbo (Italy)--Church history--Sources.
Viterbo (Italy)--History--Sources.
Princeton subject headings:
S. Stefano (Church : Viterbo, Italy)--History--Sources.
Viterbo (Italy)--Church history--Sources.