Columbia subject headings:
Russia--Relations--Switzerland--History--Sources.
Soviet Union--Relations--Switzerland--History--Sources.
Switzerland--Relations--Russia--History--Sources.
Switzerland--Relations--Soviet Union--History--Sources.
Harvard subject headings:
Russia--Relations--Switzerland--Sources.
Soviet Union--Relations--Switzerland--Sources.
Switzerland--Relations--Russia--Sources.
Switzerland--Relations--Soviet Union--Sources.
Princeton subject headings:
Russia--Relations--Switzerland--Sources.
Soviet Union--Relations--Switzerland--Sources.
Switzerland--Relations--Russia--Sources.
Switzerland--Relations--Soviet Union--Sources.