Columbia subject headings:
Harvard subject headings:
Population transfers--Germans--History--20th century--Sources.
Population transfers--Germany--History--20th century--Sources.
World War, 1939-1945--Evacuation of civilians--Poland--Wielkopolska--Sources.
World War, 1939-1945--Refugees--Poland--Wielkopolska--Sources.
Princeton subject headings:
Population transfers--Germany--History--20th century--Sources.
World War, 1939-1945--Evacuation of civilians--Poland--Wielkopolska--Sources.