ˌɪnfɚmˈeɪʃən ɐbˌaʊt ðˌɛm hˈæzbiːn dᵻɹˈaɪvd fɹʌm ˌɑːɹkɪəlˈɑːdʒɪkəl stˈʌdiz, ˈoːɹəl hˈɪstɚɹiz ɹᵻkˈaʊntɪŋ ðɛɹ tɹɐdˈɪʃənz, ænd mətˈɪɹiəlz ʌv ɹᵻlˈeɪɾᵻd tɹˈaɪbz.
Information about them has been derived from archeological  studies, oral histories recounting their traditions, and materials of related tribes.