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  -