This Web page
is an electronic companion to Chapter 6 of the book Learning to Use the
Ernest C. Ackermann .
It contains links to
the Internet resources, sites, and services mentioned in the chapter.
Using this you can access them
directly, without typing the long addresses or URLs for each
Please send any comments, questions or suggestions to Ernest Ackermann.
For orders or requests for examination copies contact the
publisher at firstname.lastname@example.org.