Columbia subject headings:
Chukotskiĭ avtonomnyĭ okrug (Russia)--Colonization--History--Sources.
Kamchatskai︠a︡ oblastʹ (Russia)--Colonization--History--Sources.
Harvard subject headings:
Chukotskiĭ avtonomnyĭ okrug (Russia)--Colonization--History--Sources.
Kamchatskai︠a︡ oblastʹ (Russia)--Colonization--History--Sources.
Princeton subject headings: