Cite
HARVARD Citation
Unknown (2013) Mechanised shield tunnelling. [Online]. Place of publication not identified : Ernst & Sohn. Available from: http://access.bl.uk/ark:/81055/vdc_100101837743.0x000001
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Unknown (2013) Mechanised shield tunnelling. [Online]. Place of publication not identified : Ernst & Sohn. Available from: http://access.bl.uk/ark:/81055/vdc_100101837743.0x000001