اذا لم تجد ما تبحث عنه يمكنك استخدام كلمات أكثر دقة.
Author: Vogel, Robert M.
Title: Tunnel Engineering: A Museum Treatment
Language: English
LoC Class: TA: Technology: Engineering and Civil engineering
Subject: Tunneling -- History
Release Date: May 24, 2012
Copyright Status: Public domain in the USA.
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