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Google圖書搜尋
A Practical Treatise on Cast and Wrought Iron Bridges and Girders ... Selected from the Public Works of the Most Eminent Engineers
William Humber
出版
1857
URL
http://books.google.com.hk/books?id=LYmZvJjvzg0C&hl=&source=gbs_api
EBook
FULL_PUBLIC_DOMAIN