REMOVE

1. farms
2. landscapes (representations)
3. roads
4. polo (field sport)

WHAT

1. Visual Works (hierarchy n … (1)
2. bridges (built works) (1)
3. color film (film) (1)
4. exterior views (1)

More 

WHERE

1. Aiken, South Carolina (1)

WHO

1. Still, Clyfford (1)
2. Still, Patricia (1)

WHEN

1. 1966 (1)
2. circa 1966 March (1)