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3
-
Optical illusions / compiled by Norman Barrett.
- 152.148 B2741
- Barrett, Norman S.
- Kingfisher,
- 1992.
- London :
-
Number puzzles / compiled by Norman Barrett.
- 513 N9711
- Kingfisher,
- 1992.
- London :
-
Science tricks / compiled by Norman Barrett.
- 500 S4161t
- Kingfisher Books,
- 1992.
- London :