Columbia subject headings:
Architecture, Modern--20th century--Philosophy.
Architecture, Modern--20th century--Themes, motives.
City planning--History--20th century.
City planning--Philosophy.
Harvard subject headings:
Architecture, Modern--20th century--Philosophy
Architecture, Modern--20th century--Themes, motives
City planning--History--20th century
City planning--Philosophy
Princeton subject headings:
Architecture, Modern--20th century--Philosophy.
Architecture, Modern--20th century--Themes, motives.
City planning--History--20th century.
City planning--Philosophy.