Article date: Feb 1961
Article title: Diversions that involve one of the classic conic sections: the ellipse
Mathematical Games column? Y
Book: 3. New Mathematical Diversions from Scientific American
Chapter: 15. The Ellipse
This data confirmed? yes
Notes
Peter Rowlett (27 August 2022):
Peter Rowlett initial guess (Uncertain)
Peter Rowlett (28 October 2023):
I have seen this chapter and column side-by-side and they match.