The programs loadkeys, dumpkeys and showkey were derived from
Risto Kankkunen's kbd-0.81.
The font loading code goes back to the codepage package by
Joel Hoffman (firstname.lastname@example.org). (He tells me that the original
reference is: "From: p. 307 of _Programmer's Guide to PC & PS/2
Video Systems_ by Richard Wilton. 1987. Microsoft Press".)
The kernel and user interface for the font loading were derived
from Eugene Crosser's intl_con package.
[Similar things were done earlier by
Jerry Kaidor (email@example.com, firstname.lastname@example.org) : fontpak,
H. Peter Anvin (email@example.com) and Pavel Zaboj (firstname.lastname@example.org).
Their code was not used, but the Latin-1 *.psf fonts were developed
by H. Peter Anvin, and the Latin-2 ones by Pavel Zaboj.]