REMOVE

1. plants
2. landscapes (representations)
3. trucks
4. horizon line
5. buildings (structures)

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)