Puzzles and teasers

Eitemau Tebyg

• Puzzles and teasers
  gan: Summers, George J
• Science teasers
  gan: Salwi, Dilip M
• Right brain teasers : a photo-quiz for the mind`s eye /
  gan: Bragdon, Allen D.
  Cyhoeddwyd: (2010)
• The Great Book of Puzzles and Teasers
  gan: George J. Summers
  Cyhoeddwyd: (1989)
• New puzzles in logical deduction
  gan: Summers, G. J
  Cyhoeddwyd: (1968)