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  • ContentsContents
  • Article infoArticle info
  • CitationCitation
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  • CitedCited
  • Article title
  • Abstract
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  • 1. Introduction
  • 2. Pre-history: Late 19th — early 20th century
  • 3. Proliferation, 1919–1944
  • 4. Communist period 1944–1989 and post-communist renewal
  • 5. Concluding remarks
  • Acknowledgements
  • References
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