REMOVE

1. roads
2. machinery
3. townscapes (representations)
4. wrist watches
5. barriers
6. shadows

WHAT

1. Visual Works (hierarchy n … (1)
2. artists (visual artists) (1)
3. automobiles (1)
4. black-and-white film (1)
5. blouses (main garments) (1)

More 

WHO

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

WHEN

1. 1967 (1)