Columbia subject headings:
Harvard subject headings:
Alaska--History--To 1867--Sources.
Rossiĭsko-amerikanskai︠a︡ kompanii︠a︡--History--Sources.
Russia--Colonies--North America--Sources.
Princeton subject headings:
Alaska--Discovery and exploration--Sources.
Discoveries in geography--Russian--Sources.
Northwest, Pacific--Discovery and exploration--Sources.
Russia--Territorial expansion--Sources.
Russian Far East (Russia)--Discovery and exploration--Sources.