Columbia subject headings:
Architecture--Brazil--Porto Alegre--History--20th century--Guidebooks.
Architecture--Brazil--Porto Alegre--History--21st century--Guidebooks.
Porto Alegre (Rio Grande do Sul, Brazil)--Buildings, structures, etc.--Guidebooks.
Harvard subject headings:
Architecture--Brazil--Porto Alegre (Rio Grande do Sul)--20th century--Guidebooks.
Architecture--Brazil--Porto Alegre (Rio Grande do Sul)--21st century--Guidebooks.
Architecture--Brazil--Porto Alegre (Rio Grande do Sul)--History--Guidebooks.
Porto Alegre (Rio Grande do Sul, Brazil)--Buildings, structures, etc.--Guidebooks.
Princeton subject headings:
Architecture--Brazil--Porto Alegre--20th century--Guidebooks.
Architecture--Brazil--Porto Alegre--21st century--Guidebooks.
Guidebooks.
Porto Alegre (Brazil)--Buildings, structures, etc.--Guidebooks.