اذا لم تجد ما تبحث عنه يمكنك استخدام كلمات أكثر دقة.
Author: Vogel, Robert M.
Title: The Engineering Contributions of Wendel Bollman
Language: English
LoC Class: T: Technology
Subject: Bollman, W. (Wendel), 1814-1884
Subject: Iron and steel bridges -- History
Release Date: Oct 20, 2010
Copyright Status: Public domain in the USA.
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