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• 522- History of science and technology
  • 522-336 Life sciences
    • 522-359 Biology
      • 522-420 Medicine; surgery; pharmacy
        • 522-448 Physicians
          • 522-458 20th century

Title

• en : 20th century
• fr : XXe siècle.

SKOS Notation

522-458

In the plan

Francis Classification Scheme