Main classes
2X
Divisions
Sections
- 010Bibliography1
- 011Bibliographies
- 012Bibliographies of individuals
- 013[Unassigned]1
- 014Of anonymous & pseudonymous works1
- 015Bibliographies of works from specific places1
- 016Bibliographies of works on specific subjects1
- 017General subject catalogs
- 018Catalogs arranged by author, date, etc.
- 019Dictionary catalogs