Columbia subject headings:
Sorge, Richard, 1895-1944--Sources.
Spies--Soviet Union--Biography.
World War, 1939-1945--Secret service--East Asia--Sources.
World War, 1939-1945--Secret service--Soviet Union--Sources.
Harvard subject headings:
Sorge, Richard, 1895-1944
Spies--Soviet Union--Biography.
World War, 1939-1945--Secret service--East Asia.
World War, 1939-1945--Secret service--Soviet Union--Sources.
Princeton subject headings:
Sorge, Richard, 1895-1944--Biography--Sources.
Spies--Soviet Union--Biography.
World War, 1939-1945--Secret service--East Asia--Sources.
World War, 1939-1945--Secret service--Soviet Union--Sources.