Columbia subject headings:
Alaska--Discovery and exploration--American.
Cartography--Alaska--History.
Discoveries in geography--American.
Discoveries in geography--Russian.
North America--Discovery and exploration--Russian.
Russians--North America.
Harvard subject headings:
Alaska--Discoveries and exploration--Russian.
Arctic regions--Discoveries and exploration--Russian.
Arctic regions--Discovery and exploration--Russian.
Cartography--Alaska--History.
Cartography--Arctic regions--History.
Cartography--North Pacific Ocean--History.
Discoveries in geography--American.
Discoveries in geography--Russian
North Pacific Ocean--Discoveries and exploration--Russian.
Princeton subject headings:
Alaska--Discovery and exploration--American.
Cartography--Alaska--History.
Discoveries in geography--American.
Discoveries in geography--Russian.
North America--Discovery and exploration--Russian.
Russians--North America.