1. Sources
  2. OECD International Trade
  3. International Trade By Commodity Statistics (SITC Rev. 2)
  4. 5: Chemicals and related products, n.e.s.
  5. 52: Inorganic chemicals
  6. 522: Inorganic chemical elements, oxides & halogen salts
  7. 5221: Chemical elements
  8. 52211: Oxygen, nitrogen, hydrogen and rare gases

52211: Oxygen, nitrogen, hydrogen and rare gases

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