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 where a sheet is folded to form 48 leaves or 96 pages. It is formed by folding a sheet five times to form 32 leaves, and then a half sheet is folded to form 16 leaves, which is inserted into the former.