REMOVE

1. rubbish
2. hats
3. doors
4. barns

WHAT

1. Visual Works (hierarchy n … (2)
2. black-and-white film (2)
3. farms (2)
4. fields (land) (2)
5. hills (2)

More 

WHERE

1. Maryland (1)
2. Westminster, Maryland (1)

WHO

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

WHEN

1. 1961 (1)
2. 1963 (1)
3. after 1961 (1)