Guthrie's Latin American Puzzle

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Across
  1. 2. copper and iron.
  2. 4. timber, and ______.
  3. 6. economic system are from _________.
Down
  1. 1. at 18 is required by___, votes for president.
  2. 3. city of _____.
  3. 5. president is _________ elected from Mexico.