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Ring of Steel: Germany And Austria-hungary At War; 1914-1918: Watson, Alexander: 9781846142215: Amazon.com: Books
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Ring of steel': Melbourne residents face $5,000 fines for trying to flee to regional Victoria | Victoria | The Guardian
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Entrance through the 'ring of steel' around the City of London. The ring of steel was originally constructed as a means to preve Stock Photo - Alamy
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