REMOVE

1. railroads
2. utility poles
3. trucks
4. plants
5. cranes (equipment)

WHAT

1. black-and-white film (2)
2. cornstalk (2)
3. fields (land) (2)
4. freight cars (2)
5. hats (2)
6. hills (2)
7. landscapes (representatio … (2)
8. machinery (2)
9. men (male humans) (2)
10. rails (transit system ele … (2)
11. rubbish (2)
12. sky (2)
13. soil (2)
14. tools (2)
15. tractors (agricultural eq … (2)
16. trains (vehicle groupings … (2)
17. trees (2)
18. Visual Works (hierarchy n … (2)
19. woods (plant communities) (2)
20. workers (2)

WHERE

1. New Windsor, Maryland (2)

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)