Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Recreational Artifacts (hierarchy name)
5. recreational artifacts (equipment)
6. sports and athletic equipment
7. ball game equipment
8. [balls for sports]

Anotations

Scope note:

Balls used in the game of American football, in the form of inflated prolate spheroids usually covered with leather having a laced seam where the edges of the cover meet; normally about 21 by 28 inches in circumference and weighing about 15 ounces.