Was the late Murray S. Klamkin ONLY an expositor?

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The late Murray S. Klamkin did a lot of mathematics expository writing, but I was wondering if that was ALL he did. So, my question is: Did the late Murray S. Klamkin ever come up with a deep-dive mathematics result of the order of, say, Suslin’s theorem (that there is an analytic subset of the reals that is not Borel)?