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- 28026186 contributor B723115.
- 28026186 contributor B723116.
- 28026186 contributor B723117.
- 28026186 created "1928.".
- 28026186 date "1928".
- 28026186 date "1928.".
- 28026186 dateCopyrighted "1928.".
- 28026186 extent "iii, 80 p.".
- 28026186 issued "1928".
- 28026186 issued "1928.".
- 28026186 language "eng".
- 28026186 publisher "Washington, U.S. Govt. print. off.,".
- 28026186 subject "Cipher and telegraph codes".
- 28026186 subject "HE7669 .U5 1927".
- 28026186 subject "Radio".
- 28026186 title "Report on the history of the use of codes and code language, the international telegraph regulations pertaining thereto, and bearing of this history on the Cortina report, by Major William F. Friedman...technical adviser, United States delegation.".
- 28026186 type "text".