Columbia subject headings:
Prisoners of war--Germany--History--20th century.
Prisoners of war--Soviet Union--History--20th century.
World War, 1939-1945--Prisoners and prisons, Russian.
Harvard subject headings:
Prisoners of war--Germany--History--20th century
Prisoners of war--Soviet Union--History
Prisoners of war--Soviet Union--History--20th century.
World War, 1939-1945--Prisoners and prisons, Russian.
Princeton subject headings:
Prisoners of war--Germany.
Prisoners of war--Soviet Union.
World War, 1939-1945--Prisoners and prisons, Russian.