Article date: Nov 1960
Article title: More about the shapes that can be made with complex dominoes
Mathematical Games column? Y
Book: 3. New Mathematical Diversions from Scientific American
Chapter: 13. Polyominoes and Fault-Free Rectangles
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.