REMOVE

1. freight cars
2. plants
3. trucks
4. black-and-white film
5. houses
6. buildings (structures)

WHAT

1. atmospheric perspective (1)
2. banks (landforms) (1)
3. barriers (1)
4. bridges (built works) (1)
5. clouds (1)
6. construction equipment (1)
7. construction sites (1)
8. cranes (equipment) (1)
9. fences (1)
10. Grand Coulee Dam (dam) (1)
11. hills (1)
12. landscapes (representatio … (1)
13. machinery (1)
14. mountains (1)
15. paths (1)
16. railroads (1)
17. rivers (1)
18. roads (1)
19. rock (1)
20. scaffolds (1)
21. sheds (storage structures … (1)
22. sky (1)
23. towers (single built work … (1)
24. townscapes (representatio … (1)
25. trees (1)
26. utility poles (1)
27. valleys (landforms) (1)
28. Visual Works (hierarchy n … (1)
29. wood products (1)

WHERE

1. Grand Coulee, Washington (1)

WHO

1. Clyfford Still; Still, Cl … (1)
2. Still, Clyfford (1)

WHEN

1. 1936 (1)
2. 1937 (1)
3. ca. 1936 - 1937 (1)