Columbia subject headings:
Holocaust, Jewish (1939-1945)--Poland.
Holocaust, Jewish (1939-1945)--Soviet Union.
Internment camps--Europe, Eastern.
Jews--Persecutions--Soviet Union.
Nazi concentration camps--Europe, Eastern.
Soviet Union--Ethnic relations.
Harvard subject headings:
Concentration camps--Europe, Eastern.
Holocaust, Jewish (1939-1945)--Poland
Holocaust, Jewish (1939-1945)--Soviet Union
Jews--Persecutions--Soviet Union.
Soviet Union--Ethnic relations.
Princeton subject headings:
Holocaust, Jewish (1939-1945)--Soviet Union.
Jews--Persecutions--Soviet Union.