Columbia subject headings:
Harvard subject headings:
Osaka (Japan)--History.
Socialism--Japan--Osaka--History.
Socialists--Japan--Osaka--Political activity--History.
Working class--Japan--Osaka--Political activity--History.
Princeton subject headings:
Osaka (Japan)--History.
Socialism--Japan--Osaka--History.
Socialists--Japan--Osaka--Political activity--History.
Working class--Japan--Osaka--Political activity--History.