TY - BOOK AU - Silber,Jules Crawford[from old catalog] TI - The invisible weapons, U1 - 940.2 PY - 1932/// CY - London PB - Hutchinson & co., limited KW - World War, 1914-1918 KW - Secret service KW - Germany KW - Censorship KW - Great Britain KW - Propaganda N1 - The story of a German secret service agent who was employed by the British Postal censorship during the war ER -