REMOVE

1. videotape, color mono sound …

WHAT

1. Audio-Video (2)
2. videotape, color mono sou … (2)

WHERE

1. American (2)

WHO

1. San Francisco Museum of M … (2)
2. Viola, Bill (2)

WHEN

1. 1977 (2)
2. 1977-1979 (2)
3. 1979 (2)
4. b. 1951 (2)