REMOVE

1. Glass negatives
2. negative
3. Library of Congress Prints a …
4. Genthe, Arnold
5. 1937
6. between 1937 and 1942

WHAT

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

WHO

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

WHEN

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