[Notice of tables of cipher words for amount, kind, and direction of clouds].

[Cipher books for use by Signal Office].
Published: (1875)

Policy of War Department in regard to use of codes and ciphers.
Published: (1921)

Use of cipher code.
Published: (1919)

Dates of cipher telegrams.
Published: (1912)

Codes and ciphers : Julius Caesar, the Enigma, and the internet /
by: Churchhouse, R. F.
Published: (2002)

Weather code.
Published: (1932)

Weather code, 1931.
Published: (1931)

[Telegraphic cipher terms used for reports of water level at New Orleans, La. station].
Published: (1874)

[Telegraphic cipher terms used for reports of water level at New Orleans, La. station].
Published: (1875)

[Telegraphic cipher terms used for reports of water level at New Orleans, La. station].
Published: (1875)

[Document not titled.].
Published: (1912)

[Document not titled.].
Published: (1928)

[Document not titled.].
Published: (1929)

General Service Code.
Published: (1918)

Elements of cryptanalysis.
Published: (1923)

[Document not titled.].
Published: (1928)

[Telegraphic cipher terms used for reports of river water levels].
Published: (1874)

Weather code.
Published: (1902)

Weather code.
Published: (1896)

Weather code.
Published: (1892)

Weather code.
Published: (1907)

Aerological code.
Published: (1926)

Aerological code (pilot balloons).
Published: (1930)

Tableau syllabique et steganographique ... = A Syllabical and steganographical table.
by: Wouves, P. R.
Published: (1797)

Instructions for using cipher device, type M-94.
Published: (1922)

Documents of Committee for Study of Code Language appointed by International Telegraph Conference of Paris of 1925, Paris, 1925, Cortina d'Ampezzo, 1926; translation of French text.
Published: (1928)

Weather code for West Indian and Caribbean Sea observers.
Published: (1917)

Use of telegraph code.
Published: (1927)

Ships' distinguishing pennants, based on Morse code.
Published: (1913)

[Instructions for use of Western Union telegraph code to and from Puerto Rico].
Published: (1899)

Call letters of vessels in Atlantic.
Published: (1910)

Preliminary War Department telegraphic code, supplemental to and to be inserted as an appendix to Western Union telegraphic code.
Published: (1899)

Use of Navy code E-3 on Army transports.
Published: (1922)

[Request for information on location of telegraph code books].
Published: (1903)

[Instructions for encrypting and sending telegraph messages].
Published: (1900)

Correction to Western Union telegraph code, universal edition.
Published: (1917)