Article date: Aug 1976
Article title: The symmetrical arrangement of the stars on the American flag and related matters
Mathematical Games column? Y
Book: 12. Time Travel and Other Mathematical Bewilderments
Chapter: 22. Tree-Plant Problems
This data confirmed? yes
Notes
Peter Rowlett (27 August 2022):
Peter Rowlett initial guess (Uncertain)
Peter Rowlett (2 November 2023):
I have seen this chapter and column side-by-side and they match.