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Tunnelling on the railway line VDE 8.1 Ebensfeld-Erfurt through the example of the Eierberge tunnel
Transport en mines et carrieres: analyse critique des differents aspects et gestion des contraintes
Thunder mountain region, Idaho county, Idaho
The modern state and prospects of exploitation of oceanological deposits of metalliferous rocks
Splitt aus Norwegen - Baurohstoffe für die europäische Küstenregion