REMOVE

1. trees
2. roads
3. cranes (equipment)
4. black-and-white film
5. utility poles
6. backdrops

WHAT

1. Visual Works (hierarchy n … (1)
2. branches (plant component … (1)
3. close-up views (1)
4. doors (1)

More 

WHERE

1. Westminster, Maryland (1)

WHEN

1. 1961 (1)
2. after 1961 (1)