SF Encyclopedia Picture Gallery
Martin Gardner. Wheels, Life and Other Mathematical Amusements (New York: W H Freeman, 1983) [nonfiction: coll: Mathematical Games: hb/R William Gosper]
From the collection of David Langford
Martin Gardner. Wheels, Life and Other Mathematical Amusements (New York: W H Freeman, 1983) [nonfiction: coll: Mathematical Games: hb/R William Gosper]
From the collection of David Langford