REMOVE

1. trees
2. windows
3. exterior views
4. wrecks (sites)

WHAT

1. automobiles (2)
2. banks (landforms) (2)
3. black-and-white film (3)
4. boys (1)
5. branches (plant component … (2)
6. brick (clay product) (2)
7. buildings (structures) (2)
8. bushes (2)
9. children (1)
10. cityscapes (representatio … (1)
11. coats (garments) (2)
12. color film (film) (1)
13. desks (1)
14. families (1)
15. family portraits (1)
16. fields (land) (2)
17. forests (plant communitie … (2)
18. freight cars (3)
19. garages (2)
20. hats (2)
21. hills (1)
22. houses (1)
23. interior views (1)
24. ladders (1)
25. landscapes (representatio … (1)
26. men (male humans) (2)
27. pipes (smoking equipment) (1)
28. plants (3)
29. railroads (3)
30. rails (transit system ele … (3)
31. roads (3)
32. rubbish (1)
33. scaffolds (1)
34. signs (declatory or adver … (4)
35. sky (3)
36. soil (3)
37. streets (1)
38. studios (work spaces) (1)
39. trains (vehicle groupings … (3)
40. utility poles (2)
41. Visual Works (hierarchy n … (4)
42. wheels (components) (2)
43. workers (2)

WHERE

1. New Windsor, Maryland (3)
2. 128 W. 23rd St., New York … (1)
3. New York, New York (1)
4. Trenton, New Jersey (1)

More 

WHO

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

More 

WHEN

1. 1969 (3)
2. 1960 (1)
3. circa 1960 October (1)