Universal decimal classification : 622 mining and mineral dressing etc /

Eitemau Tebyg

• Universal decimal classification : 69 Building etc /
  gan: British Standards Institution
• Universal decimal classification /
  gan: British Standards Institution
  Cyhoeddwyd: (1961)
• Universal decimal classification : B S 1000A /
  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. 4v in 5 : Classes 50 general works on pure science,51 mathematics etc /
  gan: British Standards Institution