Retain large dictionaries. Discard old grammars. Currency is very important. Discard after five years, except for botany and natural history. Nursing and Allied Health.
Currency is very important.
Discard after ten years. Local History, Genealogy, or Archival material will seldom, if ever, be weeded. Binding-Mending, and Discarding of Books. The actual condition of the book. The number of duplicate copies in the collection.