Columbia subject headings:
Communism--Soviet Union.
Gide, André, 1869-1951--Travel--Russia.
Soviet Union--Description and travel.
Harvard subject headings:
Communism--Soviet Union
Gide, André, 1869-1951--Journeys--Soviet Union.
Gide, André, 1869-1951--Knowledge--Soviet Union.
Soviet Union--Description and travel.
Princeton subject headings: