http://www.sciam.com/0397issue/0397kahle.html http://www.abeautifuldifference.com/gate01.html http://www.alsirat.com/postcards/index.html http://groups.google.com/groups?q=Date:+1990&hl=en&ie=ISO-8859-1&oe=ISO-8859 -1&selm=1992Sep30.134750.14161%40cs.yale.edu&rnum=10 michael http://www.waywardgeeks.org/