Columbia subject headings:
Harvard subject headings:
Kokuryūkai--History.
Occultism--Political aspects--History.
Secret societies--Germany--History.
Secret societies--Japan--History.
Thule-Gesellschaft--History.
Princeton subject headings:
Kokuryūkai--History.
Occultism--Political aspects--History.
Secret societies--Germany--History.
Secret societies--Japan--History.
Thule-Gesellschaft--History.