There are several web directories that may be used by typing in a few
well choosen search words. Extensive lists of web sites are given which
you may then check out. This process gives quite a few web sites which may
have only a passing reference to what you might be interested in. For some
of them you can get just titles of web sites, or you may select to see summaries
of the sites. This may help to narrow down the more useful sites. In addition
the most likely sites are listed first.