Hoijer 1956
Hoijer, Harry. The Chronology of the Athapaskan Languages. In: International Journal of American Linguistics, Vol. 22, No. 4 (Oct., 1956), pp. 219-232.
Hoijer, Harry. The Chronology of the Athapaskan Languages. In: International Journal of American Linguistics, Vol. 22, No. 4 (Oct., 1956), pp. 219-232.