Article date: Feb 1973
Article title: Up-and-down elevator games and Piet Hein's mechanical puzzles
Mathematical Games column? Y
Book: 11. Knotted Doughnuts and Other Mathematical Entertainments
Chapter: 10. Elevators
This data confirmed? yes
Notes
Peter Rowlett (27 August 2022):
Peter Rowlett initial guess (Uncertain)
Peter Rowlett (1 November 2023):
I have seen this chapter and column side-by-side and they match.