L10. Who wrote the book?

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Across
  1. 1. Sejong
  2. 3. the airplane
  3. 5. built
  4. 6. the book
  5. 7. writer
Down
  1. 1. sundial
  2. 2. you say
  3. 4. picture
  4. 5. clock
  5. 7. engineer