REMOVE

1. bone (material)
2. 1936

WHAT

1. Visual Works (hierarchy n … (1)
2. anatomy (1)
3. bone (material) (1)
4. studies (1)

WHO

1. Clyfford Still; Still, Cl … (1)
2. Still, Clyfford (1)

WHEN

1. 1923 (1)
2. circa 1928 (1)