The 13 states

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Across
  1. 7. Above Iowa
  2. 8. Above Louisiana
  3. 10. Above South Dakota
  4. 11. Next to Texas and Mississippi
  5. 12. Under Montana
Down
  1. 1. Above Kansas
  2. 2. Above Oklahoma
  3. 3. Above Arkansas
  4. 4. Above Wyoming
  5. 5. Under Wyoming
  6. 6. Below Kansas
  7. 9. Below North Dakota
  8. 10. Under Colorado
  9. 13. Above Missouri