Thank you, Professor Speranza, but I'd appreciate it if you would provide links to such articles if possible, rather than reproducing them in full. I often enjoy your posts, but many of them simply baffle me. All good wishes, Sue Trevor Northridge ------------------------------------------------------------------ To change your Lit-Ideas settings (subscribe/unsub, vacation on/off, digest on/off), visit www.andreas.com/faq-lit-ideas.html