Columbia subject headings:
Art--Italy--Urbino--Guidebooks.
Urbino (Italy)--Buildings, structures, etc.--Guidebooks.
Urbino (Italy)--History--Guidebooks.
Harvard subject headings:
Art--Italy--Urbino--Guidebooks.
Urbino (Italy)--Buildings, structures, etc.--Guidebooks.
Urbino (Italy)--History--Guidebooks.
Princeton subject headings: