Fun facts/events/inventions in 1942

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Across
  1. 5. popular book series with a notable spine cover
  2. 6. "Here's looking at you, kid"
  3. 7. Detector of objects
Down
  1. 1. chocolate spread invented in 1942
  2. 2. Long-standing popular Christmas tune
  3. 3. Syracuse-colored soft drink
  4. 4. Big Band "A String of Pearls" musician