On the score repository IMSLP.org there are two of his published opuses:  a set of 6 Lieder and a piano concerto. I don’t know this cantata, but I’m quite curious. I teach a course in the spring on Jewish composers.  If you email me I do have a book that discusses his music in one chapter (at least, that is my recollection; it’s been a year since  I taught the course and we had to go online suddenly, so that part got cut, so it’s been a while since I taught this (though I am again next year).  I think I have the book at home. Jeanne Swack