File:Backbone as proposed in 1956.JPG
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The Backbone system as proposed in a report by the Official Committee of civil servants on Civil Defence 1956.
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current | 11:31, 2 April 2006 | 598 × 818 (145 KB) | Riggwelter (talk | contribs) | The Backbone system as proposed in a report by the Official Committee of civil servants on Civil Defence 1956. {{PD}} |
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