by Dr. Ralph F. Wilson, E-Commerce Consultant
Web Marketing Today, June 14, 2006
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Note: The following article includes dozens of links to resources and more information -- much of it carefully organized on my website (and in some books) for further study, much of it entirely free. Please excuse the many links to my site. This article originally appeared in Web Marketing Today, Issue 39, December 1, 1997. As one of our most popular articles, it was revised most recently on June 14, 2006.
Cited in PC Magazine,
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