Columbia subject headings:
Soviet Union--Foreign relations--United States--Sources.
Soviet Union. Narodnyĭ komissariat vnutrennikh del--History--Sources.
United States--Foreign relations--Soviet Union--Sources.
United States. Office of Strategic Services--History--Sources.
World War, 1939-1945--Secret service--Soviet Union--Sources.
World War, 1939-1945--Secret service--United States--Sources.
Harvard subject headings:
Soviet Union--Foreign relations--United States--Sources.
Soviet Union. Narodnyĭ komissariat vnutrennikh del--History--Sources.
United States--Foreign relations--Soviet Union--Sources.
United States. Office of Strategic Services--History--Sources.
World War, 1939-1945--Secret service--Soviet Union--Sources.
World War, 1939-1945--Secret service--United States--Sources.
Princeton subject headings:
Soviet Union--Foreign relations--United States--Sources.
Soviet Union. Narodnyĭ komissariat vnutrennikh del--History--Sources.
United States--Foreign relations--Soviet Union--Sources.
United States. Office of Strategic Services--History--Sources.
World War, 1939-1945--Secret service--Soviet Union--Sources.
World War, 1939-1945--Secret service--United States--Sources.