REMOVE

1. hills
2. atmospheric perspective
3. plants
4. trees
5. Maryland

WHAT

1. automobiles (1)
2. banks (landforms) (1)
3. black-and-white film (1)
4. fields (land) (1)
5. forests (plant communitie … (1)
6. horizon line (1)
7. landscapes (representatio … (1)
8. roads (1)
9. sky (1)
10. utility poles (1)
11. Visual Works (hierarchy n … (1)

WHEN

1. 1960 (1)
2. 1970 (1)
3. between 1960 - 1970 (1)