Columbia subject headings:
Harvard subject headings:
Buchenwald (Concentration camp)--History.
Communists--Germany--Biography
Krämer, Walter, 1892-1941.
Political prisoners--Germany--Biography
World War, 1939-1945--Prisoners and prisons, German.
Princeton subject headings:
Buchenwald (Concentration camp)--History.
Communists--Germany--Biography.
Krämer, Walter, 1892-1941.
Political prisoners--Germany--Biography.
World War, 1939-1945--Prisoners and prisons, German.