REMOVE

1. shadows
2. automobiles
3. rivers
4. black-and-white film
5. exterior views

WHAT

1. buildings (structures) (1)
2. color film (film) (1)
3. cornstalk (2)
4. cranes (equipment) (3)
5. factories (structures) (1)
6. fields (land) (3)
7. forests (plant communitie … (1)
8. freight cars (2)
9. hats (2)
10. hills (3)
11. landscapes (representatio … (3)
12. machinery (3)
13. men (male humans) (2)
14. plants (3)
15. quarries (extracting comp … (1)
16. railroads (2)
17. rails (transit system ele … (2)
18. roads (1)
19. rock (1)
20. rubbish (2)
21. sheds (storage structures … (1)
22. sky (3)
23. soil (3)
24. tools (2)
25. tractors (agricultural eq … (2)
26. trains (vehicle groupings … (2)
27. trees (3)
28. trucks (3)
29. utility poles (3)
30. Visual Works (hierarchy n … (3)
31. woods (plant communities) (2)
32. workers (2)

WHERE

1. New Windsor, Maryland (2)
2. Westminster, Maryland (1)

WHO

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

More 

WHEN

1. 1969 (2)
2. 1975 (1)