The Amiga distribution containing the 5-Oct-91 version of Schoonschip can 
also be found on Fred Fish disk number 568.

The contents for that disk incorrectly list David N. Williams as an author
of Schoonschip.  Although he participated in the Amiga port and edited a
new version of the manual, the sole author of the program is
Martinus J. G. Veltman!

dnw, 16-Feb-92