REMOVE

1. Nitrate negatives
2. Photographs
3. Music ensembles.
4. Portrait photographs
5. Library of Congress Prints a …
6. 1921 Apr. 21

WHAT

1. Group portraits (1)
2. Music ensembles. (1)
3. Nitrate negatives (1)
4. Portrait photographs (1)

WHO

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

WHEN

1. 1869-1942 (1)
2. 1921 (1)
3. 1921 Apr. 21 (1)