REMOVE

1. landscapes (representations)
2. rock
3. tunnels
4. roads
5. 1920

WHAT

1. exterior views (1)
2. mountains (1)
3. silver gelatin (1)
4. utility poles (1)
5. Visual Works (hierarchy n … (1)

WHERE

1. Alberta, Canada (1)
2. Pacific Northwest (1)

WHO

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

WHEN

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