Article date: Sep 1958
Article title: A game in which standard pieces composed of cubes are assembled into larger forms
Mathematical Games column? Y
Book: 2. More Mathematical Puzzles and Diversions
Chapter: 6. The Soma Cube
This data confirmed? yes
Notes
Peter Rowlett (27 August 2022):
Peter Rowlett initial guess (Uncertain)
Peter Rowlett (26 October 2023):
I have seen this chapter and column side-by-side and they match.