Kay,
Dick Parsons, now deceased, was always cautious in his attributions, preferring to handle as well as look. Thus his descriptions - while lacking the technical analytical data we like to see here - are very practical. And the figures are plentiful, bur often require a close look (and careful read) when using the book as a reference when examining a rug.
I have found it useful on many occasions. For what it's worth, I have the entire series.
Regards
Chuck
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