Columbia subject headings:
Harvard subject headings:
Architecture--Portugal--Lisbon--History--20th century--Guidebooks.
Architecture--Portugal--Lisbon--History--21st century--Guidebooks.
Lisbon (Portugal)--Buildings, structures, etc.--Guidebooks.
Princeton subject headings:
Architecture--Portugal--Lisbon--History--20th century--Guidebooks.
Architecture--Portugal--Lisbon--History--21st century--Guidebooks.
Guidebooks.
Lisbon (Portugal)--Buildings, structures, etc--Guidebooks.