Columbia subject headings:
United States. Army. Counter Intelligence Corps.
World War, 1939-1945--Secret service--United States.
Harvard subject headings:
Secret service--United States--History--20th century.
United States. Army. Counter Intelligence Corps.
World War, 1939-1945--Secret service--United States.
Princeton subject headings:
Secret service--United States--History--20th century.
United States. Army. Counter Intelligence Corps
World War, 1939-1945--Secret service--United States.