REMOVE

1. soil
2. landscapes (representations)
3. rock
4. bushes
5. erosion

WHAT

1. banks (landforms) (1)
2. black-and-white film (1)
3. fields (land) (1)
4. plants (1)
5. roads (1)
6. trees (1)
7. Visual Works (hierarchy n … (1)
8. 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)