Hierarchy classification:

1. top of the aat hierarchies
2. Physical Attributes Facet
3. Attributes and Properties (hierarchy name)
4. [attributes and properties by specific type]
5. form attributes
6. size/dimensions
7. [size/dimensions by specific type]
8. [size for book formats]

Anotations

Scope note:

Book format which holds 24 leaves or 48 pages. The most common method used to produce a twenty-fourmo is to fold two separate sheets with two parallel folds in thirds. This is followed by a right angle fold, a parallel fold, and then inserting the second sheet within the first.