REMOVE

1. Glass negatives
2. Musicians.
3. Music ensembles.
4. negative
5. Library of Congress Prints a …
6. Genthe, Arnold

WHAT

1. Glass negatives (1)
2. Music ensembles. (1)
3. Photographs (1)

WHO

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

WHEN

1. 1869-1942 (1)
2. 1937 (1)
3. 1942 (1)
4. between 1937 and 1942 (1)