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• 522- History of science and technology
  • 522-171 Technology
    • 522-203 Building Techniques and Architecture, housing
      • 522-204 Building techniques and architecture
        • 522-205 History
          • 522-215A 21th century.

Title

• en : 21th century.
• fr : XXIe siècle.

SKOS Notation

522-215A

In the plan

Francis Classification Scheme