Universal decimal classification. B S 1000A : (F1D289).Abridged English rev ed /

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• Universal decimal classification. B S 1000 A : (FID289).Abridged rev ed /
  gan: British Standards Institution
  Cyhoeddwyd: (1961)
• Universal decimal classification : B S 1000B(FID 277).Trilingual abridged ed /
  gan: British Standards Institution
  Cyhoeddwyd: (1958)
• Universal decimal classification : B S 1000A /
  gan: British Standards Institution
  Cyhoeddwyd: (1961)
• Universal decimal classification /
  gan: British Standards Institution
  Cyhoeddwyd: (1961)
• Universal decimal classification : 69 Building etc /
  gan: British Standards Institution