Article date: May 1963
Article title: On "rep-tiles", polygons that can make larger and smaller copies of themselves
Mathematical Games column? Y
Book: 5. The Unexpected Hanging and Other Mathematical Diversions
Chapter: 19. Rep-Tiles: Replicating Figures on the Plane
This data confirmed? yes
Notes
Peter Rowlett (27 August 2022):
Peter Rowlett initial guess (Uncertain)
Peter Rowlett (29 October 2023):
I have seen this chapter and column side-by-side and they match.