REMOVE

1. Photograph
2. gelatin silver print
3. North American; American
4. National Gallery of Canada

WHAT

1. Photographs (4)
2. gelatin silver print (4)

WHERE

1. North American; American (4)
2. U.S.A.: California, Costa … (3)
3. U.S.A.: New York, New Yor … (1)

WHO

1. National Gallery of Canad … (4)
2. Baltz, Lewis (3)
3. Heath, Dave (1)

WHEN

1. 1974 (3)
2. before 1974 (3)
3. 1962 (1)