REMOVE

1. hills
2. fields (land)
3. trees
4. plants
5. hats

WHAT

1. artists (visual artists) (1)
2. atmospheric perspective (1)
3. automobiles (1)
4. banks (landforms) (1)
5. black-and-white film (4)
6. boys (1)
7. branches (plant component … (1)
8. brick (clay product) (1)
9. buildings (structures) (1)
10. bushes (2)
11. children (1)
12. coats (garments) (1)
13. cornstalk (2)
14. cranes (equipment) (2)
15. exterior views (2)
16. eyeglasses (1)
17. forests (plant communitie … (2)
18. freight cars (3)
19. garages (2)
20. houses (1)
21. landscapes (representatio … (3)
22. machinery (2)
23. men (male humans) (4)
24. neighborhoods (1)
25. pipes (smoking equipment) (1)
26. portraits (1)
27. railroads (3)
28. rails (transit system ele … (3)
29. roads (1)
30. rooftops (1)
31. rubbish (3)
32. signs (declatory or adver … (1)
33. sky (4)
34. soil (3)
35. tools (2)
36. tractors (agricultural eq … (2)
37. trains (vehicle groupings … (3)
38. trucks (2)
39. utility poles (3)
40. Visual Works (hierarchy n … (4)
41. wheels (components) (1)
42. windows (1)
43. woods (plant communities) (2)
44. workers (3)
45. wrecks (sites) (1)
46. 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. 1967 (1)