Columbia subject headings:
Harvard subject headings:
Cadastres--Italy--Viterbo--History--To 1500.
Names, Geographical--Italy--Viterbo--History--To 1500.
Real property--Italy--Viterbo--History--To 1500--Registers.
Viterbo (Italy)--Historical geography--Maps.
Viterbo (Italy)--Historical geography.
Princeton subject headings:
Cadastres--Italy--Viterbo--History--To 1500.
Maps.
Names, Geographical--Italy--Viterbo--History--To 1500.
Real property--Italy--Viterbo--History--To 1500--Registers.
Viterbo (Italy)--Historical geography--Maps.