These pages copyright Daniel T. Staal unless otherwise indicated. You are expressly allowed to retransmit, quote, or otherwise use the contents for non-commercial purposes, unless otherwise noted on the page, provided the orginal author is attributed. This copyright will expire 5 years after the author's death, or 30 years after publication, whichever is longer, at which time the content will revert to the public domain. If such a period is in excess of local copyright law then the term is limited by the applicable laws. All other rights reserved.