Columbia subject headings:
Harvard subject headings:
Architectural design--History--20th century.
Architectural design--History--21st century.
Architecture, Modern--21st century
Architecture--Philosophy
Space (Architecture)
Princeton subject headings:
Architectural design--Cost control.
Architectural design--History--20th century.
Architectural design--History--21st century.
Architecture--Philosophy.
Space (Architecture)--20th century.
Space (Architecture)--21st century.