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• 1001 Fonts. (LINK)
• CLAUSON-THUE, W. The ABC Universal comercial electric telegraphic code specially adapted for the use of merchants, shipowners, brokers, agents, &c. 1873.
• FLORENTE Fleck, Ferdinando. Novum testamentum vulgatae editionis. Sumtibus et typis Caroli Tauchnitii. 1840.
• Nukemap. (LINK)
• SLATER, Robert. Telegraphic code, to ensure secresy in the transmission of telegrams. Editado por W. R. Gray, 1870.