REMOVE

1. trees
2. paths
3. hills
4. rivers

WHAT

1. black-and-white negatives (1)
2. exterior views (1)
3. farmers (people in agricu … (1)
4. farms (1)
5. hats (1)
6. silver gelatin (1)
7. snow (precipitation) (1)
8. storms (1)
9. tractors (vehicles) (1)
10. Visual Works (hierarchy n … (1)
11. winter (season) (1)

WHEN

1. 1966 (1)