A PDF of Bellovin's paper (marked "draft") is available from the author at https://www.cs.columbia.edu/~smb/papers/codebooks.pdf .
A "preliminary version" of the same paper is available at https://www.cs.columbia.edu/~CS4HS/talks/codebooks.pdf .
The "International Police Telegraph code" is available at https://discovery.nationalarchives.gov.uk/details/r/C210621 ; registration required.
copperx•39m ago
Bluestein•23m ago
PS. I am really curious as to what would make one "strikingly short" as opposed to just very short or "the shortest".-