Παραπομπή APA

(2006). Safety in the underground space (32nd:2006:Seoul, Korea): World tunnel congress & ITA general assembly. [s.l.]: Elsevier Science Ltd.

Παραπομπή Chicago Style

Safety in the Underground Space (32nd:2006:Seoul, Korea): World Tunnel Congress & ITA General Assembly. [s.l.]: Elsevier Science Ltd, 2006.

Παραπομπή MLA

Safety in the Underground Space (32nd:2006:Seoul, Korea): World Tunnel Congress & ITA General Assembly. [s.l.]: Elsevier Science Ltd, 2006.

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