Columbia subject headings:
Harvard subject headings:
Germans--Baltic States--History--20th century--Congresses.
Germans--Poland--Warta River Region--History--20th century--Congresses.
Poland--History--Occupation, 1939-1945--Congresses.
World War, 1939-1945--Deportations from Estonia--Congresses.
World War, 1939-1945--Deportations from Latvia--Congresses.
World War, 1939-1945--Deportations from Lithuania--Congresses.
Princeton subject headings:
Germans--Baltic States--History--20th century--Congresses.
Germans--Poland--Warta River Region--History--20th century--Congresses.
Poland--History--Occupation, 1939-1945--Congresses.
World War, 1939-1945--Deportations from Estonia--Congresses.
World War, 1939-1945--Deportations from Latvia--Congresses.
World War, 1939-1945--Deportations from Lithuania--Congresses.