REMOVE

1. soil
2. sunlight
3. black-and-white film
4. sky
5. fields (land)

WHAT

1. clouds (1)
2. hills (1)
3. horizon line (1)
4. landscapes (representatio … (1)
5. plants (1)
6. silhouettes (1)
7. trees (1)
8. Visual Works (hierarchy n … (1)
9. woods (plant communities) (1)

WHO

1. Campbell, Sandra L. Still (1)
2. Sandra L. Still Campbell; … (1)

WHEN

1. 1961 (1)
2. after 1961 (1)