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Jun 9, 2011 at 19:30 comment added Bruce Westbury That is a nice observation.
Jun 9, 2011 at 18:50 history edited David Hill CC BY-SA 3.0
further correction.
Jun 9, 2011 at 18:44 history edited David Hill CC BY-SA 3.0
removed the last sentence, which was wrong and replaced by correct statement.; deleted 9 characters in body
Jun 9, 2011 at 18:27 history answered David Hill CC BY-SA 3.0