Columbia subject headings:
Harvard subject headings:
Civics--Study and teaching--Germany--Congresses.
Education--Germany--History--Congresses.
Education--Philosophy--Congresses.
Kerschensteiner, Georg, 1854-1932--Congresses.
Vocational education--Germany--History--Congresses.
Princeton subject headings:
Education--Germany--History.
Education--Philosophy.
Kerschensteiner, Georg, 1854-1932.
Vocational education--Germany--History.