REMOVE

1. bushes
2. automobiles
3. workers

WHAT

1. banks (landforms) (3)
2. black-and-white film (3)
3. boys (2)
4. branches (plant component … (2)
5. brick (clay product) (3)
6. buildings (structures) (4)
7. children (2)
8. coats (garments) (2)
9. color film (film) (1)
10. doors (1)
11. driveways (1)
12. exterior views (4)
13. fields (land) (3)
14. forests (plant communitie … (3)
15. freight cars (3)
16. garages (4)
17. hats (2)
18. hills (2)
19. houses (1)
20. landscapes (representatio … (2)
21. men (male humans) (4)
22. neighborhoods (1)
23. pipes (smoking equipment) (1)
24. plants (4)
25. railroads (3)
26. rails (transit system ele … (3)
27. roads (4)
28. rock (2)
29. rubbish (2)
30. service stations (1)
31. signs (declatory or adver … (3)
32. sky (3)
33. soil (3)
34. trains (vehicle groupings … (3)
35. trees (4)
36. trucks (1)
37. utility poles (3)
38. Visual Works (hierarchy n … (4)
39. wheels (components) (2)
40. windows (4)
41. wrecks (sites) (2)
42. yards (areas) (1)

WHERE

1. New Windsor, Maryland (4)

WHO

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

More 

WHEN

1. 1969 (3)
2. 1971 (1)
3. ca. 1971 (1)