登入選單
返回Google圖書搜尋
The American Electro Magnetic Telegraph
其他書名
With the Reports of Congress, and a Description of All Telegraphs Known, Employing Electricity Or Galvanism
出版Lea & Blanchard, 1845
URLhttp://books.google.com.hk/books?id=LTRkAAAAcAAJ&hl=&source=gbs_api
EBookFULL_PUBLIC_DOMAIN