A. Botts and the Möebius Strip by William Hazlett Upson “A. Botts and the Möebius Strip” by William Hazlett Upson, Saturday Evening Post, 22 December 1945.
Paul Bunyan versus the Conveyor Belt by William Hazlett Upson “Paul Bunyan versus the Conveyor Belt” by William Hazlett Upson, in The Mathematical Magpie, edited by Clifton Fadiman (Simon and Schuster, 1962).