REMOVE

1. Visual Works (hierarchy name …
2. clouds
3. 1937

WHAT

1. Grand Coulee Dam (dam) (1)
2. atmospheric perspective (1)
3. banks (landforms) (1)
4. barriers (1)

More 

WHERE

1. Grand Coulee, Washington (1)

WHO

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

WHEN

1. 1936 (1)
2. ca. 1936 - 1937 (1)