I discovered a marvelous resource for Los Angeles photography, taken by photographers from the LA Times from 1920 to 1990, curated by the UCLA Library Digital Collections. I typed in some composers names like Schoenberg, Stravinsky, and a few other names but didn’t come up with much. I typed in Music teachers and found this fun pic. The cellist/composer featured in this photo is Avner Ash who is now a Professor of Mathematics at Boston College.
Besides that, I typed in COMPOSER and came up with a great picture of Carrie Jacob Bond’s 64th birthday party (girls only??).
[Source: Los Angeles Times photographic archive, UCLA Library. Copyright Regents of the University of California, UCLA Library.]