In 1991, I wrote AT40 with a question about the charts. I asked "What's the record for most weeks at Number One?" The staff of AT40, specifically "Doctor" Rob Durkee, was gracious enough to reply. Following are pictures of his response (and the envelope the letter came in for skeptics. Any identifying information has been removed from the envelope!)

Actual letter to me from Rob Durkee

AT40 envelope