The great book of mind teasers & mind puzzlers /
Summers, George J.
Summers, George J.Mind teasers.
Summers, George J.Mind puzzlers.
New York : Sterling ; Poole : Distributed by Blandford,
c1986.
Combined ed. of: Mind teasers, 1977, and Mind puzzlers, 1984.
Includes index.
Puzzles.
Logic.