Article date: Jun 1969
Article title: Random walks, by semidrunk bugs and others, on the square and on the cube
Mathematical Games column? Y
Book: 9. Mathematical Circus
Chapter: 7. Random Walks on the Plane and in Space
This data confirmed? yes
Notes
Peter Rowlett (27 August 2022):
Peter Rowlett initial guess (Uncertain)
Peter Rowlett (2 September 2022):
I have seen copies of Scientific American June 1969 and Random Walks on the Plane and in Space in Mathematical Circus and these match.