REMOVE

1. sky
2. buildings (structures)
3. bushes
4. plants
5. fences
6. trucks
7. landscapes (representations)

WHAT

1. Visual Works (hierarchy n … (1)
2. atmospheric perspective (1)
3. barns (1)
4. black-and-white film (1)

More 

WHERE

1. New Windsor, Maryland (1)

WHEN

1. 1967 (1)
2. ca. 1967 (1)