Columbia subject headings:
Harvard subject headings:
Genocide--Poland.
Poland--History--Occupation, 1939-1945
Poland--Relations--Soviet Union
Political prisoners--Soviet Union.
Population transfers--Polish people.
Soviet Union--Relations--Poland.
World War, 1939-1945--Atrocities.
World War, 1939-1945--Deportations from Poland.
Princeton subject headings:
Poland--History--Occupation, 1939-1945.
World War, 1939-1945--Atrocities.
World War, 1939-1945--Poland.