Columbia subject headings:
Harvard subject headings:
Sekisho--Japan--Nakasendō Region--History.
Sekisho--Japan--Usui Pass (Gunma-ken and Nagano-ken)--History.
Princeton subject headings:
Sekisho--Japan--Nakasendō Region--History.
Sekisho--Japan--Usui Pass (Gunma-ken and Nagano-ken)--History.