26 May 1962, American Institute of Physics, Niels Bohr Library & Archives - Session II Oral history interview transcript with Paul Sophus Epstein on 2 June 1962, American Institute of Physics, Niels Bohr Library & Archives - Session III National Academy of Sciences Biographical Memoir 1883 births 1966 deaths People from Warsaw Governorate Russian people of Polish-Jewish descent American people of Polish-Jewish descent 20th-century American mathematicians 20th-century American physicists Russian mathematicians Moscow State University alumni Technical University of Munich alumni California Institute of Technology faculty Members of the United States National Academy of Sciences Fellows of the American Physical Society Emigrants from the Russian Empire to the United States