hiː sˈɜːvd ɔnðə fˈækəlti ʌvðə jˌuːnɪvˈɜːsᵻɾi ʌv mˈɪʃɪɡən ɪn nˈaɪntiːnhˈʌndɹɪd fˈɪfti fˈoːɹ sˈɪksti nˈaɪn, bᵻfˌoːɹ mˈuːvɪŋ tə hˈɑːɹvɚd jˌuːnɪvˈɜːsᵻɾi æz ɐ fˈʊl pɹəfˈɛsɚ.
He served on the faculty of the University of Michigan in 1954–69, before moving to Harvard University as a full professor.