Bill D -

Your first link above is an excellent description of the "problem." Recommended reading for anyone really interested in deep stuff.

The second one shows the extent to which the "easy ways" in to the deep stuff often cost money (and are hence inaccessible to misers like us). Quite a few (not all) of the resources listed there are "pay per click," "with paid membership," or "fee based" search resources. That's sort of a separate topic, but this is one area where I'll go with your usual willingness to work a little harder to find the "free way."

John