Copyright (C) 1996 by Cambridge University Press.
   Permission to copy without fee is granted provided that this copyright
   notice and the DISCLAIMER OF WARRANTY are included in any copy.

   DISCLAIMER OF WARRANTY.  These programs are provided `as is' without
   warranty of any kind.  We make no warranties, express or implied, that the
   programs are free of error, or are consistent with any particular standard
   of merchantability, or that they will meet your requirements for any
   particular application.  They should not be relied upon for solving a
   problem whose incorrect solution could result in injury to a person or loss
   of property.  If you do use the programs or functions in such a manner, it
   is at your own risk.  The author and publisher disclaim all liability for
   direct, incidental or consequential damages resulting from your use of
   these programs or functions.