Article date: Jun 1968
Article title: Combinatorial possibilities in a pack of shuffled cards
Mathematical Games column? Y
Book: 8. Mathematical Magic Show
Chapter: 7. Playing Cards
This data confirmed? yes
Notes
Peter Rowlett (27 August 2022):
Peter Rowlett initial guess (Very uncertain)
Peter Rowlett (30 October 2023):
I have seen this chapter and column side-by-side and they match.