Columbia subject headings:
Polish people--Foreign countries--History--20th century.
Political prisoners--Poland--History.
Political refugees--Poland--History.
World War, 1939-1945--Deportations from Poland.
World War, 1939-1945--Refugees.
Harvard subject headings:
Polish people--Foreign countries
World War, 1939-1945--Poland.
World War, 1939-1945--Refugees.
Princeton subject headings:
Polish people--Foreign countries--History--20th century.
Political prisoners--Poland--History.
Political refugees--Poland--History.
World War, 1939-1945--Deportations from Poland.
World War, 1939-1945--Refugees.