REMOVE

1. automobiles
2. plants
3. black-and-white film
4. horizon line

WHAT

1. atmospheric perspective (1)
2. banks (landforms) (1)
3. fields (land) (1)
4. forests (plant communitie … (1)
5. hills (1)
6. landscapes (representatio … (1)
7. roads (1)
8. sky (1)
9. trees (1)
10. utility poles (1)
11. Visual Works (hierarchy n … (1)

WHERE

1. Maryland (1)

WHEN

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