Steinberg, William, 1899-1978Alternative names
Steinberg had been in the U.S. since 1938. He apparently developed a friendly relationship with Alma Mahler over the course of this period, with her attending some performances and inviting him to her home.
From the description of Correspondence to Alma Mahler, 1948-1954. (University of Pennsylvania Library). WorldCat record id: 155864539