REMOVE

1. rock
2. sky
3. hills
4. plants
5. soil

WHAT

1. automobiles (1)
2. banks (landforms) (1)
3. black-and-white film (1)
4. boys (1)
5. branches (plant component … (1)
6. brick (clay product) (1)
7. buildings (structures) (2)
8. bushes (1)
9. children (1)
10. color film (film) (1)
11. cranes (equipment) (1)
12. exterior views (2)
13. factories (structures) (1)
14. fields (land) (2)
15. forests (plant communitie … (2)
16. freight cars (1)
17. garages (1)
18. landscapes (representatio … (2)
19. machinery (1)
20. men (male humans) (1)
21. quarries (extracting comp … (1)
22. railroads (1)
23. rails (transit system ele … (1)
24. roads (2)
25. rubbish (1)
26. sheds (storage structures … (1)
27. signs (declatory or adver … (1)
28. trains (vehicle groupings … (1)
29. trees (2)
30. trucks (1)
31. utility poles (2)
32. Visual Works (hierarchy n … (2)
33. wheels (components) (1)
34. windows (1)
35. workers (1)

WHERE

1. New Windsor, Maryland (1)
2. Westminster, Maryland (1)

WHO

1. Campbell, Sandra L. Still (1)
2. Clyfford Still; Still, Cl … (1)
3. Sandra L. Still Campbell; … (1)
4. Still, Clyfford (1)

More 

WHEN

1. 1969 (1)
2. 1975 (1)