NSA and OSA

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Across
  1. 5. Agriculture
  2. 6. rivers
  3. 7. Cows
  4. 9. trade
  5. 11. Silt
  6. 12. tools Stone tools
  7. 13. Ox
Down
  1. 1. farmland
  2. 2. Transportation
  3. 3. Persian
  4. 4. sheep
  5. 8. Ozti
  6. 10. cites