REMOVE

1. gelatin silver print
2. Photographs
3. architecture, wall
4. Callahan, Harry

WHAT

1. architecture, wall (2)
2. gelatin silver print (2)

WHERE

1. North American; American (2)

WHO

1. Callahan, Harry (2)
2. George Eastman House (2)

WHEN

1. 1968 (1)
2. 1974 (1)