REMOVE

1. trees
2. plants
3. trains (vehicle groupings)
4. sky
5. boys
6. bushes

WHAT

1. Visual Works (hierarchy n … (1)
2. black-and-white film (1)
3. branches (plant component … (1)
4. brick (clay product) (1)

More 

WHERE

1. New Windsor, Maryland (1)

WHEN

1. 1966 (1)
2. ca. 1966 (1)