Article date: Mar 1966
Article title: The hierarchy of infinities and the problems it spawns
Mathematical Games column? Y
Book: 7. Mathematical Carnival
Chapter: 3. Aleph-Null and Aleph-one
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.