REMOVE

1. railroads
2. roads
3. trees
4. railroad stations
5. 1945

WHAT

1. exterior views (1)
2. forests (plant communitie … (1)
3. landscapes (representatio … (1)
4. mountains (1)

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WHERE

1. Lake Louise, Alberta, Can … (1)

WHO

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

WHEN

1. 1920 (1)
2. between circa 1929 and ci … (1)