Maidl, B. (2008). Hardrock tunnel boring machines. Ernst and sohn.
Chicago Edition CitationMaidl, Bernhard...[et.al]. Hardrock Tunnel Boring Machines. Berlin: Ernst and sohn, 2008.
Deismireacht MLAMaidl, Bernhard...[et.al]. Hardrock Tunnel Boring Machines. Ernst and sohn, 2008.
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