
Copyright (c) 1989-91 Jonathan Rees

This material was developed by Jonathan Rees.  Permission to copy this
software, to redistribute it, and to use it for any purpose is
granted, subject to the following restrictions and understandings.

1. Any copy made of this software must include this copyright notice
in full.

2. Users of this software agree to make their best efforts (a) to
return to the author any improvements or extensions that
they make, so that these may be included in future releases; and (b)
to inform the author of noteworthy uses of this software.

3. All materials developed as a consequence of the use of this
software shall duly acknowledge such use, in accordance with the usual
standards of acknowledging credit in academic research.

4. The author has made no warrantee or representation that the
operation of this software will be error-free, and the author is under
no obligation to provide any services, by way of maintenance, update,
or otherwise.
