Columbia subject headings:
City planning--Portugal--Lisbon--History--Exhibitions.
Lisbon (Portugal)--Buildings, structures, etc.--Exhibitions.
Unbuilt architectural projects--Portugal--Lisbon--Exhibitions.
Harvard subject headings:
City planning--Portugal--Lisbon--History--Exhibitions.
Exhibition catalogs
Lisbon (Portugal)--Buildings, structures, etc.--Exhibitions.
Unbuilt architectural projects--Portugal--Lisbon--Exhibitions.
Princeton subject headings:
City planning--Portugal--Lisbon--History--Exhibitions.
Lisbon (Portugal)--Buildings, structures, etc.--Exhibitions.
Unbuilt architectural projects--Portugal--Lisbon--Exhibitions.