Columbia subject headings:
Architecture--North America--History--20th century.
Architecture--Soviet Union--Foreign influences.
Architecture--Soviet Union--History.
Harvard subject headings:
Architecture--North America--History.
Architecture--Soviet Union--Foreign influences.
Architecture--Soviet Union--History--20th century.
Princeton subject headings:
Architecture--North America--History.
Architecture--Soviet Union--Foreign influences.
Architecture--Soviet Union--History--20th century.