REMOVE

1. erosion
2. 1935
3. 1975

WHAT

1. banks (landforms) (1)
2. barriers (1)
3. black-and-white film (1)
4. bridges (built works) (1)
5. buildings (structures) (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. rivers (1)
17. roads (1)
18. rock (1)
19. rubbish (1)
20. scaffolds (1)
21. sheds (storage structures … (1)
22. sky (1)
23. soil (1)
24. valleys (landforms) (1)
25. Visual Works (hierarchy n … (1)
26. wood products (1)

Less

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)