Columbia subject headings:
City planning--Italy--Perugia--Congresses.
Hospitals--Italy--Perugia--Congresses.
Monteluce (Perugia, Italy)--Buildings, structures, etc.--Congresses.
Perugia (Italy)--Buildings, structures, etc.--Congresses.
Harvard subject headings:
Architecture--Italy--Perugia--20th century--Congresses
City planning--italy--Perugia--Congresses.
Princeton subject headings: