Eyewitness to early American telegraphy
著者
書誌事項
Eyewitness to early American telegraphy
（Telecommunications (New York, 1974- )）
Arno Press, 1974
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注記
Reprint of The American electro magnetic telegraph, by A. Vail, published in 1845 by Lea & Blanchard, Philadelphia; of Description of the American electro magnetic telegraph, by A. Vail, printed in 1845 by J. & G. S. Gideon, Washington; of Early history of the electro-magnetic telegraph, by A. Vail, published in 1914 by Hine Brothers, New York
