REMOVE

1. rock
2. trees
3. buildings (structures)
4. Westminster, Maryland

WHAT

1. black-and-white film (1)
2. brick (clay product) (1)
3. color film (film) (1)
4. cranes (equipment) (1)
5. doors (1)
6. exterior views (2)
7. factories (structures) (1)
8. farms (1)
9. fields (land) (1)
10. forests (plant communitie … (1)
11. hills (1)
12. landscapes (representatio … (1)
13. machinery (1)
14. paths (1)
15. plants (2)
16. quarries (extracting comp … (1)
17. roads (1)
18. sheds (storage structures … (2)
19. sky (1)
20. soil (1)
21. trucks (1)
22. utility poles (1)
23. Visual Works (hierarchy n … (2)
24. yards (areas) (1)

WHEN

1. 1961 (1)
2. 1975 (1)
3. after 1961 (1)