REMOVE

1. trees
2. trains (vehicle groupings)
3. farms
4. 1968 Summer

WHAT

1. Visual Works (hierarchy n … (1)
2. color film (film) (1)
3. cranes (equipment) (1)
4. fires (events) (1)

More 

WHERE

1. Carroll County, Maryland (1)
2. New Windsor, Maryland (1)

WHO

1. Still, Patricia (1)

WHEN

1. 1968 (1)