Columbia subject headings:
Soviet Union--Relations--United States--Sources.
United States--Relations--Soviet Union--Sources.
Harvard subject headings:
Soviet Union--Relations--United States--Sources.
United States--Relations--Soviet Union--Sources.
Princeton subject headings:
Russia--Relations--United States--Sources.
Soviet Union--Relations--United States--Sources.
United States--Relations--Russia--Sources.
United States--Relations--Soviet Union--Sources.