© Copyright Avi Sion, 2004.
Protected by international and Pan-American copyright conventions.
No part of this book may be reproduced in any manner whatsoever, or stored in a retrieval system or transmitted, without express permission of the Author-publisher, except in case of brief quotations with due acknowledgement.
Published 2004, by The Logician, c/o Avi Sion in Geneva, Switzerland.
(Small revisions, 2009.)