He participated in a year-long research expedition to the river Kureyka near Turukhansk in the Krasnoyarsk Province.
hiː pɑːɹtˈɪsᵻpˌeɪɾᵻd ɪn ɐ jˈɪɹlˈɔŋ ɹᵻsˈɜːtʃ ˌɛkspədˈɪʃən tə ðə ɹˈɪvɚ kjˈʊɹɹɪkə nˌɪɹ tjɚɹˈʌkhænsk ɪnðə kɹˈæsnɔɪˌɑːɹsk pɹˈɑːvɪns.