MathHappens - MakerFair San Diego Day 2. Lewis Carroll puzzles, coloring Fractals and robot geometry! | Facebook
Rediscovered Lewis Carroll Puzzles by Lewis Carroll | LibraryThing
Rediscovered Lewis Carroll Puzzles de Wakeling, Edward (Ed); Carroll, Lewis: Very Good Soft cover (1995) First Edition First Printing | Gargoyle Books, IOBA
Rediscovered Lewis Carroll Puzzles - Lewis Carroll, Edward Wakeling - Google Books