. "Koyukon language" . . . . . "Koyukon Athabascan" . . . . . . . . . "Denaakk'e" . "Koyukon Athabaskan" . "Koyukon language" . . . . . . . . . "Central Koyukon" . . . . . . . "koy" . . . . . . . . . "Koyukon" .