The links below are known to be dead. They did contain some great and useful information. Fortunately, they can still be accessed in a web archive. The text will be present, but the graphic images may be lost.
To use the WayBack Machine, you may need to cut and past the URL into the web site http://www.archive.org. If you find any other dead links, don't give up. Try using the Wayback Machine! Please be patient, as the Wayback Machine can be slow...
