REMOVE

1. trucks
2. trees
3. sky
4. barns

WHAT

1. atmospheric perspective (1)
2. black-and-white film (2)
3. buildings (structures) (2)
4. bushes (1)
5. churches (buildings) (1)
6. cornstalk (1)
7. doors (1)
8. exterior views (2)
9. farms (1)
10. fences (1)
11. fields (land) (2)
12. forests (plant communitie … (2)
13. freight cars (1)
14. garages (1)
15. hills (1)
16. horizon line (1)
17. houses (1)
18. ladders (1)
19. landscapes (representatio … (2)
20. plants (2)
21. porches (1)
22. railroads (1)
23. rails (transit system ele … (1)
24. roads (1)
25. rooftops (1)
26. rubbish (1)
27. soil (1)
28. towers (building division … (1)
29. trains (vehicle groupings … (1)
30. utility poles (2)
31. Visual Works (hierarchy n … (2)
32. wheels (components) (1)
33. windows (1)
34. wrecks (sites) (1)

WHERE

1. New Windsor, Maryland (2)

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. 1967 (1)
2. 1969 (1)
3. ca. 1967 (1)