Columbia subject headings:
Architecture and society--History--21st century.
Architecture, Modern--21st century.
City planning--History--21st century.
Harvard subject headings:
Architecture and society--History--21st century.
Architecture, Modern--21st century
City planning--History--21st century.
Princeton subject headings:
Architecture and society--History--21st century.
Architecture, Modern--21st century.
City planning--History--21st century.