REMOVE

1. Portrait photographs
2. Nitrate negatives
3. Photographs
4. Artists' studios.

WHAT

1. Artists' studios. (1)
2. Artists. (1)
3. negative (1)
4. Nitrate negatives (1)
5. Portrait photographs (1)

WHO

1. Genthe, Arnold (1)
2. Library of Congress Print … (1)

WHEN

1. 1869-1942 (1)
2. 1920 (1)
3. 1942 (1)
4. between 1920 and 1942 (1)