The help of these people is gratefully acknowledged.

    AK   Andreas Koenig <andreas.koenig@franz.ww.tu-berlin.de>
    CMC  Chris Chalfant <chalfant_chris_m@lilly.com>
    DB   Dan Bernstein <djb@koobera.math.uic.edu>
    GT   Gene Titus <gene@shalott.ots.utexas.edu>
    IP   Ian Phillipps <ian@dial.pipex.com>
    JB   Jos Backus <jos@oce.nl>
    JPB  Joao Bordalo <jpb@ip.pt>
    MdlR Michael de la Rue <mikedlr@tardis.ed.ac.uk>
    MP   Mark Powell <mark@salford.ac.uk>
    NMS  Nickolay Saukh <nms@nns.ru>
    RDM  Raul Miller <rdm@test.legislate.com>
    SB   Stephen Beckstrom-Sternberg <sbeckstr@rapd.gig.usda.gov>

Tim Goodwin
<tjg@star.le.ac.uk>
1999-09-08
