Classifying with dewey decimal classification ( editions 19 and 20) /

Eitemau Tebyg

• Exercises in the 20th edition of the Dewey decimal classification
  gan: Comaromi, John P, et al.
  Cyhoeddwyd: (1990)
• Dewey Decimal Classification and Relative Index
  gan: Dewey, Melvil
  Cyhoeddwyd: (1979)
• Dewey Decimal Classification and Relative Index
  gan: Dewey, Melvil
  Cyhoeddwyd: (1971)
• Dewey Decimal Classification and Relative Index
  gan: Dewey, Melvil
  Cyhoeddwyd: (1971)
• Dewey Decimal Classification and Relative Index
  gan: Dewey, Melvil
  Cyhoeddwyd: (1979)