Columbia subject headings:
Architecture--Portugal--Lisbon--History--20th century--Pictorial works.
Architecture--Portugal--Lisbon--History--20th century.
Architecture--Portugal--Lisbon--Pictorial works.
Lisbon (Portugal)--Buildings, structures, etc.--Pictorial works.
Harvard subject headings:
Princeton subject headings:
Architecture, Modern--20th century--Portugal--Lisbon--Pictorial works.
Architecture--Portugal--Lisbon--History--20th century.
Architecture--Portugal--Lisbon--Pictorial works.
Lisbon (Portugal)--Buildings, structures, etc.--Pictorial works.