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• 522- History of science and technology
  • 522-255 Earth sciences
    • 522-314 Human action
      • 522-319 Agriculture
        • 522-322 Agricultural techniques
          • 522-332 20th century

Title

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

SKOS Notation

522-332

In the plan

Francis Classification Scheme