An interesting article by P.T. Pappas and Alexis Guy Obolensky from Electronics & Wireless World, Dec. 1988. http://gsjournal.net/Science-Journals/Journal%20Reprints-Mechanics%20/%20Ele ctrodynamics/Download/3332 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://amrad.org/pipermail/tacos/attachments/20141124/1d1c0c5e/attachment.html>