Columbia subject headings:
Harvard subject headings:
Architects--Germany--History--20th century.
Architects--Sweden--History--20th century.
Architecture and society--Germany--History--20th century.
Architecture and society--Sweden--History--20th century.
Social engineering--Germany--History--20th century.
Social engineering--Sweden--History--20th century.
Princeton subject headings:
Architects--Germany--20th century.
Architects--Sweden--20th century.
Social engineering--Germany--History--20th century.
Social engineering--Sweden--History--20th century.