(1995). An introduction to pipe jacking and microtunnelling design. London: Pipe Jacking Association.
Παραπομπή Chicago StyleAn Introduction to Pipe Jacking and Microtunnelling Design. London: Pipe Jacking Association, 1995.
Παραπομπή MLAAn Introduction to Pipe Jacking and Microtunnelling Design. London: Pipe Jacking Association, 1995.
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