REMOVE

1. rock
2. barriers
3. mountains
4. cranes (equipment)
5. construction equipment
6. 1937

WHAT

1. Visual Works (hierarchy n … (1)
2. artists (visual artists) (1)
3. atmospheric perspective (1)
4. black-and-white film (1)
5. bushes (1)

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WHERE

1. New Windsor, Maryland (1)

WHEN

1. 1967 (1)