dvidvi:

  From the executable:

  This is dvidvi 1.0, Copyright (C) 1988-91, Radical Eye Software

  From the source:

   *    The original program is by Tomas Rokicki (version 0.5) but it was
   *    modified and improved by Esteban ZIMANYI ezimanyi@rc1.vub.ac.be
   *    to give version 1.0.

a5booklet (the little shell script):

  (c) 1997 David A. van Leeuwen

  Inspired by the dvidvi source and man page.
