Columbia subject headings:
Education and state--Japan--Nagano-ken--History--20th century--Sources.
Teachers--Political activity--Japan--Nagano-ken--History--20th century--Sources.
Harvard subject headings:
Education and state--Japan--Nagano-ken--History--20th century--Sources.
Teachers--Political activity--Japan--Nagano-ken--History--20th century--Sources.
Princeton subject headings:
Education and state--Japan--Nagano-ken--History--20th century--Sources.
Teachers--Political activity--Japan--Nagano-ken--History--20th century--Sources.