Hierarchy classification:

1. top of the aat hierarchies
2. Associated Concepts Facet
3. Associated Concepts (hierarchy name)
4. multidisciplinary concepts
5. [dates and dating systems]
6. dates (spans of time)

Anotations

Scope note:

Date range of years representing the earliest and latest dates for the most important or principal body of items in the group. There may be multiple sets of bulk dates for any group (e.g., 1914-1918 and 1939-1945 (bulk dates)).