Columbia subject headings:
Harvard subject headings:
Bockhorn (Friesland, Germany)--History--20th century.
Cemeteries--Germany--Bockhorn (Friesland)--History--20th century.
Prisoners of war--Germany
Prisoners of war--Soviet Union.
World War, 1939-1945--Prisoners and prisons, French.
World War, 1939-1945--Prisoners and prisons, Polish.
World War, 1939-1945--Prisoners and prisons, Soviet.
Princeton subject headings:
Cemeteries--Germany--Bockhorn (Friesland).
World War, 1939-1945--Prisoners and prisons, Russian.