REMOVE

1. sky
2. hills
3. hats
4. soil

WHAT

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

WHERE

1. New Windsor, Maryland (3)

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 (2)