Columbia subject headings:
Art--Italy--Perugia--Guidebooks.
Perugia (Italy)--Guidebooks.
Harvard subject headings:
Architecture--Italy--Perugia--Guidebooks.
Art--Italy--Perugia--Guidebooks.
Perugia (Italy)--Guidebooks.
Princeton subject headings:
Art--Italy--Perugia--Guidebooks.
Perugia (Italy)--Guidebooks.