bᵻtwˌiːn nˈaɪntiːnhˈʌndɹɪd sˈɛvənti fˈaɪv ænd nˈaɪntiːnhˈʌndɹɪd sˈɛvənti ˈeɪt ɹˈɪft vˈæli ɹᵻsˈɜːtʃ mˈɪʃən ɪn ˌiːθɪˈoʊpiə kəndˈʌktᵻd ɐdˈɪʃənəl ɹᵻsˈɜːtʃ, fˈɑːloʊd baɪ ðɛɹ tˈiːm ɪn nˈaɪntiːnhˈʌndɹɪd ˈeɪɾi wˈʌn.
Between 1975 and 1978 Rift Valley Research Mission in Ethiopia conducted additional research, followed by their team in 1981.