REMOVE

1. mountains
2. silver gelatin
3. houses
4. California
5. 1920

WHAT

1. Visual Works (hierarchy n … (1)
2. cliffs (1)
3. coastlines (1)
4. exterior views (1)

More 

WHO

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

WHEN

1. 1945 (1)
2. between circa 1929 and ci … (1)