Article date: Nov 1970
Article title: A new collection of short problems and the answers to some of "life's"
Mathematical Games column? Y
Book: 10. Wheels, Life, and Other Mathematical Amusements
Chapter: 3. The Knotted Molecule and Other Problems
This data confirmed? yes
Notes
Peter Rowlett (27 August 2022):
Peter Rowlett initial guess (Uncertain)
Peter Rowlett (11 September 2023):
Removed initial guess as located elsewhere.
Peter Rowlett (30 October 2023):
I have seen this chapter and column side-by-side and they match.