This page originally appeared on the web site of the Rand Corp., a think-tank funded mostly or entirely by the US Department of Defense (I think!). The cited page has disappeared from that site, but Google has archived it. Go to it now and check out some of the excellent links, some of which I'd never seen. http://www.rand.org/about/contacts/personal/genea/other.html -- --- Richard Danca Newton, MA rdanca@gmail.com ------