1. Sources
  2. OECD International Trade
  3. International Trade By Commodity Statistics (SITC Rev. 3)
  4. 6: Manufactured goods
  5. 64: Paper and paper manufactures
  6. 642: Paper & paperboard, cut to shape or size, articles
  7. 6422: Envelopes, correspondence cards; paper stationery
  8. 64222: Letter-cards, plain postcards, correspondence cards

64222: Letter-cards, plain postcards, correspondence cards

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