REMOVE

1. tunnels
2. Pacific Northwest
3. 1920

WHAT

1. exterior views (1)
2. landscapes (representatio … (1)
3. mountains (1)
4. roads (1)
5. rock (1)
6. silver gelatin (1)
7. utility poles (1)
8. Visual Works (hierarchy n … (1)

WHERE

1. Alberta, Canada (1)

WHO

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

WHEN

1. 1945 (1)
2. between circa 1929 and ci … (1)