Columbia subject headings:
Harvard subject headings:
Kłodzko (Poland)--History, Military--20th century.
Poland--History--Occupation, 1939-1945
Polish people--Germany--Congresses.
Slave labor--Poland--Kłodzko--Congresses.
World War, 1939-1945--Conscript labor--Germany--Congresses.
World War, 1939-1945--Prisoners and prisons, German--Congresses.
Princeton subject headings:
Fortification--Poland--Kłodzko--History--20th century.
Kłodzko (Poland)--History, Military--20th century.
Poland--History--Occupation, 1939-1945.
World War, 1939-1945--Prisoners and prisons, German.