World`s 200 hardest brain teasers: Mind boggling puzzles, problems, and curious questions to sharpen your brain
Gruber, Gary R.
World`s 200 hardest brain teasers: Mind boggling puzzles, problems, and curious questions to sharpen your brain - Naperville Sourcebooks - 188p.
978-1-4022-3857-4
793.73 G921B
World`s 200 hardest brain teasers: Mind boggling puzzles, problems, and curious questions to sharpen your brain - Naperville Sourcebooks - 188p.
978-1-4022-3857-4
793.73 G921B