Article date: May 1968
Article title: Circles and spheres, and how they kiss and pack
Mathematical Games column? Y
Book: 9. Mathematical Circus
Chapter: 3. Spheres and Hyperspheres
This data confirmed? yes
Notes
Peter Rowlett (27 August 2022):
Peter Rowlett initial guess (Uncertain)
Peter Rowlett (30 October 2023):
I have seen this chapter and column side-by-side and they match.