- Collection ID
- CAB81
- Conflict
- Second World War
- Document Reference
- CAB 81/91/43
- File Reference
- CAB 81/91
- Identifier
- 10.1080/swwf.cab81.0091.043
- Keywords
- Security Wireless Communications
- Pages
- 2
- Published in
- United Kingdom
- Themes
- Signals Intelligence and Code-breaking