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The international mercantile telegraph code, by the author of the 'General telegraph code'.
Free
The general telegraph code, compiled for the use of bankers, merchants, brokers, and shareholders by the author of the 'Cotton telegraph code'.
Free
The 'Numeral code' supplement to the 'Cotton telegraph code', by the author of the 'General telegraph code'.
Free
The Liverpool cotton telegraph code. Ed. A.
Free
The Appendix telegraph code, a blank code of German ciphers
Free
Cotton telegraph code [by H.R. Meyer].
Free
The Globe commercial telegraph code: Volume 50
Free
The Liverpool cotton telegraph code. Ed. A. Ed. B.
Free
The Commercial telegraph code. A re-compiled ed. of the 'International telegraph code'.
Free