Article date: Jan 1957
Article title: A new kind of magic square with remarkable properties
Mathematical Games column? Y
Book: 1. Mathematical Puzzles and Diversions
Chapter: 2. Magic with a Matrix
This data confirmed? yes
Notes
Peter Rowlett (27 August 2022):
Peter Rowlett initial guess (Very uncertain)
Peter Rowlett (24 October 2023):
I have seen this chapter and column side-by-side and they match.