ON 20060306@9:46:38 AM at page:
http://techref.massmind.org/techref/logic/xtrapins.htm#
David A Cary[DAV-MP-E62a] edited the page. Difference:
http://techref.massmind.org/techref/diff.asp?url=H:\techref\logic\xtrapins.htm&version=8