REMOVE

1. trees
2. soil
3. mountains
4. barriers
5. 1936

WHAT

1. Visual Works (hierarchy n … (2)
2. buildings (structures) (2)
3. exterior views (2)
4. farmhouses (2)
5. farms (2)

More 

WHERE

1. Westminster, Maryland (2)

WHO

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

WHEN

1. 1964 (2)
2. 1963 (1)
3. 1963 - 1964 (1)