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Benjamin Franklin Lieber
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Lieber's standard telegraphic code
Benjamin Franklin Lieber · Lieber Publishing Co.
808 sayfa · 1896
Cipher and telegraph codes / Telegraph codes
Liebèr's five letter American telegraphic code,
Lieber, Benjamin Franklin, 1853-1915. · New York, The Liebèr code co.
980 sayfa · 1915
Cipher and telegraph codes.