Columbia subject headings:
Architecture, Modern--20th century--Conservation and restoration.
Architecture, Modern--20th century.
Building materials--History--20th century.
Buildings, Prefabricated--Conservation and restoration.
Buildings, Prefabricated--History--20th century.
Harvard subject headings:
Architecture, Industrial--20th century.
Architecture, Modern--20th century
Buildings, Prefabricated--20th century.
Princeton subject headings:
Architecture, Industrial--20th century.
Architecture, Modern--20th century.
Buildings, Prefabricated--20th century.