Columbia subject headings:
Harvard subject headings:
Education and state--Germany (East)--Congresses.
Friedrich-Schiller-Universität Jena--History--Congresses.
Political persecution--Germany--History--20th century--Congresses.
Socialism and education--Germany (East)--Congresses.
Students--Germany--Social conditions--20th century--Congresses.
Universities and colleges--Germany--History--20th century--Congresses.
Princeton subject headings:
Education and state--Germany--Jena--Congresses.
Education, Higher--Political aspects--Germany--Jena--Congresses.
Friedrich-Schiller-Universität Jena--History--20th century--Congresses.