Article date: Oct 1969
Article title: A numeranalysis by Dr. Matrix of the lunar flight of Apollo 11
Mathematical Games column? Y
Book: 4. The Magic Numbers of Dr. Matrix
Chapter: 13. The Moon
This data confirmed? yes
Notes
Peter Rowlett (5 September 2022):
I have seen copies of Scientific American Oct 1969 and The Moon in The Magic Numbers of Dr. Matrix and these match.