Columbia subject headings:
International travel--Soviet Union--History.
Russians--Travel--History.
Tourism--Government policy--Soviet Union.
Tourism--Soviet Union--History.
Visitors, Foreign--Soviet Union--History.
Harvard subject headings:
Princeton subject headings:
International travel--Soviet Union--History.
Russians--Travel--History.
Tourism--Government policy--Soviet Union.
Tourism--Soviet Union--History.
Visitors, Foreign--Soviet Union--History.